Prior to 1946, the section of the patent laws governing recovery
in patent infringement actions contained no reference to interest.
In 1946 the section was amended, and now provides in 35 U.S.C. §
284 that the court shall award a successful claimant
"damages adequate to compensate for the infringement, but in no
event less than a reasonable royalty for the use made of the
invention by the infringer, together with interest and costs as
fixed by the court."
In respondent Devex Corp.'s action against petitioner for
infringement of a patent covering a lubricating process used in the
cold-forming of metal car parts by pressure, the District Court
entered judgment for Devex pursuant to § 284, awarding, in addition
to royalties and postjudgment interest, prejudgment interest. After
determining what the annual royalty payments would have been, the
court calculated prejudgment interest on each payment from the time
it would have become due. The Court of Appeals affirmed.
Held: The award of prejudgment interest was proper in
this case. Pp.
461 U. S.
651-657.
(a) Section 284 does not incorporate the pre-1946 common law
standard enunciated in
Duplate Corp. v. Triplex Safety Glass
Co., 298 U. S. 448,
under which prejudgment interest could not be awarded where damages
were unliquidated, absent bad faith or other exceptional
circumstances. Rather, § 284 gives a court general authority to fix
interest, and this authority, on the face of § 284, is not
restricted to exceptional circumstances. Pp.
461 U. S.
651-654.
(b) Both the background and language of § 284 provide evidence
that the underlying purpose of the provision is that prejudgment
interest should ordinarily be awarded where necessary to afford the
plaintiff full compensation for the infringement. Consistent with
this purpose, prejudgment interest should ordinarily be awarded
absent some justification for withholding such an award. In the
typical case, an award of prejudgment interest is necessary to
ensure that the patent owner is in as good a position as he would
have been if the infringer had entered into a reasonable royalty
agreement. An award of interest from the time that the royalty
payments would have been received merely serves to make the patent
owner whole, since his damages consist not only of the
Page 461 U. S. 649
value of the royalty payments but also of the forgone use of the
money between the time of infringement and the date of the
judgment. Pp.
461 U.S.
654-657.
667 F.2d 347, affirmed.
MARSHALL, J., delivered the opinion for a unanimous Court.
STEVENS, J., filed a concurring opinion,
post, p.
461 U. S.
658.
JUSTICE MARSHALL, delivered the opinion of the Court.
This case concerns the proper standard governing the award of
prejudgment interest in a patent infringement suit under 35 U.S.C.
§ 284.
I
In 1956, respondent Devex Corporation (Devex) filed a suit for
patent infringement against petitioner General Motors Corporation
(GMC) in the United States District Court for the Northern District
of Illinois. [
Footnote 1] Devex
alleged that GMC was infringing Reissue Patent No. 24,017, known as
the "Henricks" or "Devex" patent. The patent covered a lubricating
process used in the cold-forming of metal car
Page 461 U. S. 650
parts by pressure. [
Footnote
2] On June 29, 1962, the District Court held the Devex patent
invalid and entered judgment for GMC. On appeal, the United States
Court of Appeals for the Seventh Circuit reversed the finding of
invalidity and remanded for further proceedings.
Devex Corp. v.
General Motors Corp., 321 F.2d 234 (1963),
cert.
denied, 375 U.S. 971 (1964).
The case was then transferred to the United States District
Court for the District of Delaware. After a trial, the District
Court ruled that there had been no infringement. 316 F. Supp. 1376
(1970). The United States Court of Appeals for the Third Circuit
reversed, holding that the patent was infringed by GMC's use of
certain processes in the production of bumpers and cold-extruded
nonbumper parts. 467 F.2d 257 (1972),
cert. denied, 411
U.S. 973 (1973).
On remand, the case was referred to a Special Master for an
accounting. The Special Master ruled that three major divisions of
GMC had used infringing processes in the manufacture of bumper
parts, and selected a royalty rate "by reference to hypothetical
negotiations" that it found would have taken place if GMC had
sought to obtain a license from Devex. Special Master's Report at
71.
See 667 F.2d 347,
Page 461 U. S. 651
352 (CA3 1981). [
Footnote 3]
The District Court modified the royalty rate selected by the
Special Master and entered judgment pursuant to 35 U.S.C. § 284,
awarding Devex $8,813,945.50 in royalties, $11,022,854.97 in
prejudgment interest, and postjudgment interest at the rate allowed
by state law.
494 F.
Supp. 1369 (1980). The court determined what the annual royalty
payments would have been, and calculated prejudgment interest on
each payment from the time it would have become due. The Court of
Appeals affirmed. 667 F.2d 347 (1981). The court held that "the
award of [prejudgment] interest as the yearly royalty payments
became due was not an abuse of discretion."
Id. at 363. We
granted certiorari to consider the standard applicable to the award
of prejudgment interest under 35 U.S.C. § 284, 456 U.S. 988 (1982),
and we now affirm.
II
Prior to 1946, the provision of the patent laws concerning a
plaintiff's recovery in an infringement action contained no
reference to interest. [
Footnote
4] The award of interest in patent cases was governed by the
common law standard enunciated in several decisions of this Court.
E.g., Duplate Corp. v. Triplex Safety Glass Co.,
298 U. S. 448
(1936);
Tilghman v. Proctor, 125 U.
S. 136 (1888). Under the
Duplate standard,
prejudgment interest was generally awarded from the date
Page 461 U. S. 652
on which damages were liquidated, and could be awarded from the
date of infringement in the absence of liquidation only in
"exceptional circumstances," such as bad faith on the part of the
infringer. 298 U.S. at
298 U. S. 459.
[
Footnote 5]
In 1946, Congress adopted amendments to the provision of the
patent laws governing recovery in infringement actions. Act of Aug.
1, 1946, § 1, 60 Stat. 778, 35 U.S.C. §§ 67, 70 (1946 ed.).
[
Footnote 6] One of the amended
provisions, which has since been recodified as 35 U.S.C. § 284,
states in relevant part:
"Upon finding for the claimant the court shall award the
claimant damages adequate to compensate for the infringement, but
in no event less than a reasonable royalty for the use made of the
invention by the infringer, together with interest and costs as
fixed by the court."
The Courts of Appeals have reached differing conclusions as to
whether § 284 incorporates the
Duplate standard and, more
generally, as to the standard governing the award of prejudgment
interest under § 284. [
Footnote
7]
Page 461 U. S. 653
We have little doubt that § 284 does not incorporate the
Duplate standard. Under that standard, which evolved as a
matter of federal common law, prejudgment interest could not be
awarded where damages were unliquidated, absent bad faith or other
exceptional circumstances. By contrast, § 284 gives a court general
authority to fix interest and costs. On the face of § 284, a
court's authority to award interest is not restricted to
exceptional circumstances, and there is no warrant for imposing
such a limitation. When Congress wished to limit an element of
recovery in a patent infringement action, it said so explicitly.
With respect to attorney's fees, Congress expressly provided that a
court could award such fees to a prevailing party only "in
exceptional cases." 35 U.S.C. § 285. [
Footnote 8] The power to award interest was not similarly
restricted.
There is no basis for inferring that Congress' adoption of the
provision concerning interest merely incorporated the
Duplate standard. This is not a case in which Congress has
reenacted statutory language that the courts had interpreted in a
particular way. In such a situation, it may well be appropriate to
infer that Congress intended to adopt the established judicial
interpretation.
See, e.g., 459 U. S. S.
654� MacLean v. Huddleston,
459 U.
S. 375, 459 U. S.
384-386 (1983); Lorillard v. Pons,@
434 U.
S. 575,
434 U. S.
580-581 (1978). In this case, however, the predecessor
statute did not contain any reference to interest, and the 1946
amendments specifically added a provision concerning interest in
patent infringement actions. We cannot agree with petitioner that
the only significance of Congress' express provision for the award
of interest was the incorporation of a common law standard that
developed in the absence of any specific provision concerning
interest.
Having decided that § 284 does not incorporate the
Duplate rule, we turn to a consideration of the proper
standard for awarding prejudgment interest under that provision.
Although the language of § 284 supplies little guidance as to the
appropriate standard, for the reasons elaborated below, we are
convinced that the underlying purpose of the provision strongly
suggests that prejudgment interest should ordinarily be awarded
where necessary to afford the plaintiff full compensation for the
infringement.
Both the background and language of § 284 provide evidence of
this fundamental purpose. Under the pre-1946 statute, the owner of
a patent could recover both his own damages and the infringer's
profits.
See Aro Mfg. Co. v. Convertible Top Co.,
377 U. S. 476,
377 U. S. 505
(1964);
n 4,
supra. A
patent owner's ability to recover the infringer's profits reflected
the notion that he should be able to force the infringer to
disgorge the fruits of the infringement even if it caused him no
injury. In 1946, Congress excluded consideration of the infringer's
gain by eliminating the recovery of his profits,
Aro Mfg. Co.,
supra, at
377 U. S. 505,
the determination of which had often required protracted
litigation. H.R.Rep. No. 1587, 79th Cong., 2d Sess., 1-2 (1946);
S.Rep. No. 1503, 79th Cong., 2d Sess., 2 (1946); 92 Cong.Rec. 9188
(1946) (remarks of Sen. Pepper). At the same time, Congress sought
to ensure that the patent owner would, in fact, receive full
compensation for "any damages" he suffered as a result of the
Page 461 U. S. 655
infringement.
See H.R.Rep. No. 1587,
supra, at
1 ("any damages the complainant can prove"); S.Rep. No. 1503,
supra, at 2 (same). Accordingly, Congress expressly
provided in § 284 that the court "shall award the claimant damages
adequate to compensate for the infringement." (Emphasis
added.) [
Footnote 9]
The standard governing the award of prejudgment interest under §
284 should be consistent with Congress' overriding purpose of
affording patent owners complete compensation. In light of that
purpose, we conclude that prejudgment interest should ordinarily be
awarded. In the typical case, an award of prejudgment interest is
necessary to ensure that the patent owner is placed in as good a
position as he would have been in had the infringer entered into a
reasonable royalty agreement. [
Footnote 10] An award of interest from the time that
Page 461 U. S. 656
the royalty payments would have been received merely serves to
make the patent owner whole, since his damages consist not only of
the value of the royalty payments, but also of the forgone use of
the money between the time of infringement and the date of the
judgment.
This very principle was the basis of the decision in
Waite
v. United States, 282 U. S. 508
(1931), which involved a patent infringement suit against the
United States. The patent owner had been awarded unliquidated
damages in the form of lost profits, but had been denied an award
of prejudgment interest. This Court held that an award of
prejudgment interest to the patent owner was necessary to ensure
"complete justice as between the plaintiff and the United States,"
id. at
282 U. S. 509,
even though the statute governing such suits did not expressly
provide for interest. Just as § 284 provides that the court shall
award "damages adequate to compensate for the infringement," the
statute at issue in
Waite provided that the patentee shall
receive "reasonable and entire compensation." 35 U.S.C. § 68 (1940
ed.). In addition, § 284 contains a specific provision concerning
interest.
Waite thus provides strong support for our
conclusion that prejudgment interest should ordinarily be awarded
under § 284.
We do not construe § 284 as requiring the award of prejudgment
interest whenever infringement is found. That provision states that
interest shall be "fixed by the court," and, in our view, it leaves
the court some discretion in awarding
Page 461 U. S. 657
prejudgment interest. For example, it may be appropriate to
limit prejudgment interest, or perhaps even deny it altogether,
where the patent owner has been responsible for undue delay in
prosecuting the lawsuit. [
Footnote 11] There may be other circumstances in which it
may be appropriate not to award prejudgment interest. We need not
delineate those circumstances in this case. We hold only that
prejudgment interest should be awarded under § 284 absent some
justification for withholding such an award.
III
Because we hold that prejudgment interest should ordinarily be
awarded absent some justification for withholding such an award, a
decision to award prejudgment interest will only be set aside if it
constitutes an abuse of discretion. The District Court held that
GMC infringed Devex's patent over the course of a number of years,
and awarded Devex a reasonable royalty as compensation. While GMC
contends that Devex was guilty of causing unnecessary delay, the
District Court rejected this contention when it concluded that
"Devex has done no worse than fully litigate its claims achieving a
large judgment in its favor," and awarded Devex costs on the basis
of this conclusion.
494 F.
Supp. at 1380. [
Footnote
12] On these facts, we agree with the Court of Appeals that the
award of prejudgment interest was proper.
Page 461 U. S. 658
Accordingly, the judgment of the Court of Appeals for the Third
Circuit is
Affirmed.
[
Footnote 1]
The suit also named Houdaille Industries as a defendant. After
the case against GMC was transferred to the United States District
Court for the District of Delaware, the case against Houdaille
Industries was tried separately,
see Devex Corp. v. Houdaille
Industries, Inc., 382 F.2d 17 (CA7 1967), and eventually
settled.
[
Footnote 2]
Claim 4 of the patent covers:
"The process of working ferrous metal which comprises forming on
the surface of the metal a phosphate coating and superimposing
thereon a fixed film of a composition comprising a solid meltable
organic binding material containing distributed therethrough a
solid inorganic compound meltable at a temperature below the
melting point of the ferrous metal phosphate of said coating and
having a hardness not exceeding 5 on the Mohs' hardness scale, and
thereafter deforming the metal."
In less technical terms, the Devex process employed
"phosphate, soap and borax . . . to lubricate the
pressure-forming operation, preventing harmful contact between the
metal products and the machinery with which they are formed. . . .
[T]he phosphate, soap and borax combination is especially
beneficial because it may be easily cleaned from the metal product
following its formation."
494 F.
Supp. 1369, 1372 (Del.1980).
[
Footnote 3]
The Special Master also ruled that multiple damages and
attorney's fees, which are authorized by 35 U.S.C. §§ 284 and 285,
would be inappropriate in this case. 667 F.2d at 356, n. 8. These
findings were adopted by the District Court and affirmed by the
Court of Appeals, and are not before us.
[
Footnote 4]
Rev.Stat. § 4921, as amended, 42 Stat. 392, 35 U.S.C. § 70 (1964
ed.), provided in relevant part.
"[U]pon a decree being rendered in any such case for an
infringement the complainant shall be entitled to recover, in
addition to the profits to be accounted for by the defendant, the
damages the complainant has sustained thereby. "
[
Footnote 5]
Under the common law rule a plaintiff's damages were often
treated as liquidated if they were relatively certain and
ascertainable by reference to established market values.
See
generally Miller v. Robertson, 266 U.
S. 243,
266 U. S. 258
(1924); D. Dobbs, Law of Remedies § 3.5 (1973); C. McCormick, Law
of Damages §§ 51, 54-56 (1935); Prejudgment Interest: An Element of
Damages Not to be Overlooked, 8 Cumberland L.Rev. 521, 522-523
(1977). Thus a plaintiff whose damages were determined by reference
to an established royalty that the plaintiff charged for the use of
the patent was entitled to prejudgment interest. In contrast, where
a plaintiff's damages, as here, were based on a reasonable royalty
determined by the court, they were unliquidated, and not entitled
to prejudgment interest, absent exceptional circumstances.
[
Footnote 6]
In the 1952 codification, §§ 67 and 70 of the 1946 Code were
consolidated in § 284, which has remained unchanged through the
present day. The stated purpose of the codification was merely
"reorganization in language to clarify the statement of the
statutes." H.R.Rep. No.1923, 82d Cong., 2d Sess., 10, 29
(1952).
[
Footnote 7]
Compare Columbia Broadcasting System, Inc. v. Zenith Radio
Corp., 537 F.2d 896 (CA7 1976) (no prejudgment interest absent
exceptional circumstances);
Radiator Specialty Co. v.
Micek, 395 F.2d 763 (CA9 1968) (same) (dictum),
with
Georgia-Pacific Corp. v. U.S. Plywood-Champion Papers, Inc.,
446 F.2d 295 (CA2) (§ 284 does not incorporate
Duplate
standard),
cert. denied, 404 U.S. 870 (1971);
Trio
Process Corp. v. L. Goldstein's Sons, Inc., 638 F.2d 661 (CA3
1981) (same);
General Electric Co. v. Sciaky Bros. Inc.,
415 F.2d 1068 (CA6 1969) (same);
Milgo Electronic Corp. v.
United Business Communications, Inc., 623 F.2d 645 (CA10)
(same),
cert. denied, 449 U.S. 1066 (1980).
[
Footnote 8]
Section 285 provides: "The court in exceptional cases may award
reasonable attorney fees to the prevailing party." The phrase
"exceptional cases" was not contained in the 1946 amendments, but
was added by the 1952 compilation for purposes of clarification
only.
See n 6,
supra. The language of the 1946 amendments provided in
relevant part that "the Court may
in its discretion award
reasonable attorney's fees to the prevailing party." 35 U.S.C. § 70
(1964 ed.) (emphasis added).
[
Footnote 9]
The wording of the amendment passed by Congress in 1946 was
slightly different. It provided that the claimant "shall be
entitled to recover general damages which shall be
due
compensation" for the infringement. 35 U.S.C. § 70 (1946 ed.)
(emphasis added).
See n 6,
supra.
Section 284 derived from a House bill which specifically
provided for an award of interest "from the time the infringement
occurred." H.R. 5311, 79th Cong., 2d Sess. (1946);
see
H.R.Rep. No. 1587, 79th Cong., 2d Sess., pt. 2, p. 1 (1946). The
bill as modified by the Senate Committee and enacted into law
replaced this language with the language currently contained in §
284. The legislative history suggests that the language
substitution was intended solely to make the award of attorney's
fees discretionary, rather than mandatory; there was no indication
that the Senate Committee intended any substantive change in the
treatment of interest.
See S.Rep. No. 1503, 79th Cong., 2d
Sess., 2 (1946). The passage of the Senate bill in the House was
preceded by an assurance by Representative Lanham, who managed the
bill, that the only substantive modification of the House bill
concerned the attorney's fees provision. 92 Cong.Rec. 9881
(1946).
[
Footnote 10]
See Waite v. United States, 282 U.
S. 508,
282 U. S. 509
(1931);
Jacobs v. United States, 290 U. S.
13,
290 U. S. 16
(1933) (interest from time of the taking is necessary to constitute
adequate compensation under the Fifth Amendment);
Miller v.
Robertson, 266 U. S. 243,
266 U. S. 258
(1924) (prejudgment interest required for "full compensation"). The
traditional view, which treated prejudgment interest as a penalty
awarded on the basis of the defendant's conduct, has long been
criticized on the ground that prejudgment interest represents
"delay damages," and should be awarded as a component of full
compensation.
See Dobbs,
supra, n 5, § 3.5, at 174; McCormick,
supra, n 5, § 51, at
206-211; 8 Cumberland L.Rev.
supra, n 5, at 521. A rule denying prejudgment interest
not only undercompensates the patent owner, but also may grant a
windfall to the infringer and create an incentive to prolong
litigation. There is no reason why an infringer should stand in a
better position than a party who agrees to pay a royalty and then
fails to pay because of financial difficulties.
[
Footnote 11]
See, e.g., Board of Comm'rs v. United States,
308 U. S. 343,
308 U. S.
352-353 (1939);
Redfield v. Bartel,
139 U. S. 694,
139 U. S. 701
(1891);
First National Bank of Chicago v. Material Service
Corp., 597 F.2d 1110, 1120-1121 (CA7 1979).
See generally
McCormick, supra, n 5, at
220-221, 228-229 (cases cited therein); 8 Cumberland L.Rev. supra,
n 5, at 534 (cases cited
therein). The determination whether the plaintiff has unduly
delayed prosecution of the lawsuit is committed to the discretion
of the district court, and is reviewable on appeal only for abuse
of discretion.
[
Footnote 12]
The District Court's decision to award costs rested on its
conclusion that Devex did not cause "unnecessary delay or [obtain]
only slight success."
494 F.
Supp. at 1380. The Court of Appeals affirmed the award of
costs, and that issue is not before us.
JUSTICE STEVENS, concurring.
The 1946 amendments to the patent laws replaced the
Duplate standard with a presumption favoring the award of
prejudgment interest in the ordinary case. As the Court correctly
holds, however, § 284 does not automatically require an "award of
prejudgment interest whenever infringement is found."
Ante
at
461 U. S. 656.
In exercising its discretion to deny such interest in appropriate
cases, the trial court may properly take into account the nature of
the patent and the strength of the defendant's challenge.
In other contexts, we have noted the public function served by
patent litigation. In
Lear, Inc. v. Adkins, 395 U.
S. 653,
395 U. S. 670
(1969), Justice Harlan, writing for the Court, explained:
"A patent, in the last analysis, simply represents a legal
conclusion reached by the Patent Office. Moreover, the legal
conclusion is predicated on factors as to which reasonable men can
differ widely. Yet the Patent Office is often obliged to reach its
decision in an
ex parte proceeding, without the aid of the
arguments which could be advanced by parties interested in proving
patent invalidity."
Hence, a patent challenge in the courts permits a more informed
decision regarding the merits of a particular patent. And, as we
have long recognized,
"[i]t is as important to the public that competition should not
be repressed by worthless patents, as that the patentee of a really
valuable invention should be protected in his monopoly. . . ."
Pope Manufacturing Co. v. Gormully, 144 U.
S. 224,
144 U. S. 234
(1892).
Of course, the general public interest in patent litigation does
not justify denial of prejudgment interest in the typical
Page 461 U. S. 659
case in which infringement is found. Wisely, today the Court
does not attempt to define precisely the category of cases in which
an infringer, although ultimately unsuccessful in litigation, may
have been sufficiently justified in its challenge to a particular
patent to make it appropriate for the district court to exercise
its discretion to deny prejudgment interest. But the existence of
that category of cases should not be overlooked.