1. In 1876, a decree was made affirming the principles of a
decree below in a suit in equity for relief against infringement of
a patent, but sending the case back to ascertain and correct the
amount of the damages, on principles laid down by the court. The
master reported in 1879.
Held that under the
circumstances, it was equitable to allow interest on the amount
from the date of the report.
2. A suit in equity seeking relief against an infringement of a
patent does not abate by the death of the plaintiff, but may be
prosecuted to final judgment by his legal representative.
Page 110 U. S. 302
MR. CHIEF JUSTICE WAITE delivered the opinion of the Court.
The effect of the judgments in these cases, when here on the
former appeals, as reported under the name of
The Cawood
Patent, 94 U. S. 695, was
to affirm the decrees then appealed from, so far as they charged
these appellants respectively with the profits made from the use of
the infringing machines known as the "Illinois Central," the
"Etheridge," and the "Whitcomb," and to reverse as to the profits
made by the use of the "Bayonet Vise," the "Michigan Southern," and
the "Beebee & Smith," which were adjudged to be noninfringing
machines. The total amount of profits arising from the use of all
the machines, infringing and noninfringing, was settled, and the
judgment of the courts was that the profits had properly been
estimated by comparing the cost of mending on the machines with the
cost of mending on a common anvil. This was found to be about
thirty-six cents per foot mended in favor of the machines. Nothing
was left open for further inquiry but the amounts of the former
recoveries for the use of the noninfringing machines. It was quite
right, therefore, for the circuit court, when the cases went back,
to direct the master to ascertain from the old evidence, if
possible, and, if not, from new, how much should be deducted from
the old decrees on account of the erroneous recoveries. The true
way of determining this clearly was to find out what part of the
profits for which the original decrees were rendered had been made
by the use of the noninfringing machines. This the master attempted
to do, and in the case of the Illinois Central company there is no
doubt in our minds that the conclusion he reached was entirely
correct. In fact, we do not understand that this is disputed. It is
argued that a sufficient allowance was not made in the accounting
for cut rails, but that question was settled by the original
decree, and could not be reexamined on this reference. The inquiry
now is limited to the amount of mending done by the use of the
noninfringing machines and its comparative cost.
Page 110 U. S. 303
In the case of the Michigan Southern & Northern Indiana
Company, the evidence is not as satisfactory as in that of the
Illinois Central. The shop books in which the accounts for
repairing rails were kept, if kept at all, were not produced, and
had probably been destroyed as of no value before the accounting
took place. In their absence, it is difficult to determine with
accuracy what the facts were, but upon full consideration we are
satisfied the circuit court did not in its decree underestimate the
amount of deduction to be made in favor of this company.
In making up the decree, interest was added from the date of the
master's report on the balances found due after the ascertained
deductions had been made, and this is assigned for error. As a
general rule, a patentee is not entitled to interest on profits
made by an infringer. The reason is that profits are regarded in
the light of unliquidated damages.
Parks v. Booth,
102 U. S. 96, but
in many of the cases it is said that circumstances may arise in
which it would be proper to add interest.
Mowry v.
Whitney, 14 Wall. 620;
Littlefield v.
Perry, 21 Wall. 205. Here, as has been seen, in
effect, the original decrees rendered in July, 1874, were affirmed
in 1876, to the extent of the present recoveries. The cases were
only sent back to ascertain how much should be deducted from those
decrees for errors in the accounts as then stated. If the decrees
had been entered originally for the present amounts, the patentee
would have been entitled to interest from 1874. That was settled in
Railroad Company v. Turrill, 101 U.
S. 836, which was one of the cases affirmed in whole at
the former hearing in this Court. Under these circumstances, it
seems to us not at all inequitable to allow interest on the
corrected amounts from the date of the master's report in 1879. The
cases are entirely different in this particular from what they
would have been if the original decrees had been reversed for error
in the principles of the accounting. Those decrees may very
properly be considered as affirmed in part and reversed in part,
the new reference being had only to find out the exact extent of
the reversals.
Since the present appeals were taken, the patentee has died, and
the appellants now suggest that the causes of action do not
survive, and the suits cannot be further prosecuted in the name
Page 110 U. S. 304
of the legal representatives of the decedent. As to this it is
sufficient to say that what was called by Chief Justice Marshall,
in
Gordon v.
Ogden, 3 Pet. 33, "the silent practice of the
Court" has always been the other way. It is everyday practice to
revive such suits, and the books are full of cases in which this
has been silently done, no one apparently entertaining a doubt of
its propriety.
The decree in each of the cases is
Affirmed.
MR. JUSTICE BLATCHFORD did not sit in these cases, and took no
part in their decision.