The validity and the infringement of letters patent No. 117,92,
granted Aug. 8, 1871, for an improvement in gas pumps for oil
wells, having been established,
held that the case being
an exceptional one inasmuch as the market for such pumps was
confined to a particular region and the demand for them was so
limited that although no other species of pump could successfully
compete with them, a single manufacturer could easily and with
reasonable promptness fill all orders for them, the patentee is
entitled to recover the difference between the cost of the material
and labor used by the infringes in making the pumps which he sold
and the price which he received for them.
The facts are stated in the opinion of the Court.
MR. CHIEF JUSTICE WAITE delivered the opinion of the Court.
The only questions raised on this appeal relate to the amount
which the Goulds' Manufacturing Company is entitled to recover for
the infringement of letters patent No. 117,925, dated Aug. 8, 1871,
for an improvement in pumps "specially designed for drawing off the
gas from oil wells and conducting the same to the furnace of the
engine." The validity and the infringement of the letters are not
disputed here.
After the letters and the infringement were established below,
the case was sent to a master to ascertain the damages. He reported
that 298 pumps had been manufactured and sold by the defendants,
out of which a net profit of $47.71 on each pump had been realized,
that being the difference between the cost of the material and
labor used in making a pump and the price at which it was sold.
Upon this report the court ruled that, as the patent was only for
an improvement on an old pump, the profits for which the defendants
were accountable must be confined to such as were realized from the
manufacture of the patented improvement, and not from the whole
pump as improved. For this reason, a new reference was ordered to
state the account on the proper basis.
Page 105 U. S. 254
The second report was in its result substantially the same as
the first. The number of pumps made and sold was the same, and the
profit on each pump estimated to be $46.46. The mode of calculating
the profits was also the same -- that is to say, on the second
reference as on the first, the defendants were charged with the
price at which they sold the pump as a whole, and credited only
with the cost of labor and material used in the manufacture. The
master on the second reference, however, reported further as
follows:
"I find as further facts from the evidence that the plaintiffs'
pump, with their patented improvement, which they had introduced
into the market, virtually controlled the market and had superseded
all the other pumps then in use for pumping gas, and the others
were literally driven out of the market, as they could not be sold
at the places where the plaintiffs' pump had been introduced. The
defendants went into the very market where the plaintiffs' pump had
been introduced, and where they had sold, and where plaintiffs were
then supplying most of their pumps, and the defendants in fact went
and employed Wenson, the former agent of the plaintiffs, to sell
the pumps for them, and he, from being the plaintiffs' agent in the
locality, made very ready sale of the same pumps for the
defendants, and had not the defendants interfered in urging the
pumps which they manufactured upon this local market, the
plaintiffs would certainly have had the whole market to themselves,
and would beyond doubt have secured orders and supplied the demand
of the market for the same number of pumps more than they did sell,
as the defendants furnished, to-wit 298 pumps. The plaintiffs were
by their agent in the field furnishing pumps in those oil regions,
and would have supplied the market demand had not the defendants
intervened and supplied to the market these 298 pumps."
This finding as to the facts is, in its general effect,
supported by the evidence. Notwithstanding this, however, the
court, still adhering to its holding as to the rule of estimating
profits, set aside the report, and inasmuch as the company had, on
the second reference, failed to show what had been realized upon
the principles of accounting prescribed, a final decree was entered
in its favor for nominal damages only and
Page 105 U. S. 255
costs. From that decree this appeal was taken by the
company.
The rule applicable to this class of cases was well stated by
Mr. Justice Strong, speaking for the whole Court, in
Mowry v.
Whitney, 14 Wall. 620. The subject matter of that
suit was a patent for an improvement in the process of
manufacturing car wheels, and in respect to the profits resulting
to an infringer from the use of the patented process, it was said,
p.
81 U. S.
651:
"The question to be determined . . . is what advantage did the
defendant derive from using the complainant's invention over what
he had in using other processes then open to the public, and
adequate to enable him to obtain an equally beneficial result. The
fruits of that advantage are his profits."
It does not necessarily follow from this that where the patent
is for one of the constituent parts, not for the whole of a
machine, the profits are to be confined to what can be made by the
manufacture and sale of the patented part separately. If, without
the improvement, a machine adapted to the same uses can be made
which will be valuable in the market and salable, then, as was
further said in that case, the inquiry is "What was the advantage
in cost, in skill required, in convenience of operation or
marketability" gained by the use of the patented improvement? If
the improvement is required to adapt the machine to a particular
use, and there is no other way open to the public of supplying the
demand for that use, then it is clear the infringer has by his
infringement secured the advantage of a market he would not
otherwise have had, and that the fruits of this advantage are the
entire profits he has made in that market. Such, we think, is this
case. Pumps for all ordinary, and many extraordinary, uses were
very old, but in the new developments of business, something was
wanted to take the gas from the casing of an oil well and conduct
it safely to the furnace of the engine. "With that special purpose
in view," this inventor took the well known parts of an ordinary
double action pump, changed some of them slightly in form, added a
new device, and produced something which an improvement in pumps,
he actually made an improved pump. For ordinary uses, the
improvement added nothing to
Page 105 U. S. 256
the value of the old pump, but for the new and special purpose
in view, the old pump was useless without the improvement. The
testimony shows that there was no market for pumps adapted to this
particular use except in the oil producing regions of Pennsylvania
and Canada. The demand was limited as well as local. Less than a
thousand pumps actually supplied all who wanted them. But for that
particular use no other pump could at the time be sold. If the
appellant kept the control of its monopoly under the patent, it
alone had the advantage of this market. Unless the appellees got
the improved pumps, they could not become competitors in that
field, and just to the extent they got into the field, they drove
the appellant out. Through their infringement, they got the
advantage of selling the pumps that had upon them the patented
improvement. Without it, no such sales would have been effected.
The fruits of the advantage they gained by their infringement were
therefore necessarily the profits they made on the entire sale.
This is an exceptional case. A limited locality required a
particular kind of pump, to be used only in that locality for a
special purpose. The market was not only limited to a particular
locality, but it was unusually limited in demand. A single
manufacturer possessing the facilities the appellant had could
easily and with reasonable promptness fill every order that was
made. There was no other pump that could successfully compete with
that controlled by the patent. Under these circumstances, it is
easy to see that what has been the appellees' gain in this business
must necessarily have been the appellant's loss, and consequently
the appellant's damages are to be measured by the appellees'
profits derived from their business in that special and limited
market. This, as it seems to us, is the logical result of the rule
which has been stated. By infringing on the appellant's rights, the
appellees obtained the advantage of the increased marketability of
their pumps. The action of the court below, therefore, limiting the
field of inquiry as to damages cannot be sustained.
We cannot agree with the master, however, in his estimate of the
profits made by the appellees from what they have done. He finds
that the pumps sold in the market for eighty dollars
Page 105 U. S. 257
each, while the cost of manufacturing them was only $33.54. It
is true there is some evidence to show that pumps could be made for
the sum named, but it is clear to our minds that many things were
excluded from the estimate which ought to have been included. All
the material and labor of men may have been taken into account, but
there is nothing for the use of tools, machinery, power, and other
facilities employed in the manufacture, and nothing for wastage and
expenses of marketing. One of the appellees is reported as
testifying that his firm made the pumps for $31.37 each, but this
must be an error, because he at the same time stated he could not
say that there was any profit at all at the prices for which sales
were made. Clearly this could not be if what only cost the sum
named was sold for $80. Annexed to the statement of the testimony
of this witness is a detailed estimate of the cost of manufacture,
which, without any allowance for general expenses, made the cost of
a single pump $91.96. The appellant furnishes some evidence to
contradict this estimate, but the bare fact that the pump when
finished brought, as is claimed at the shop, $80, shows that the
cost must have been much more than the master has reported. Down to
the time of this patent, the market had been supplied with some
device to accomplish what this improvement did. The change in the
old pump was not an expensive one. The valves were put outside of
the side chambers instead of inside, and the joints had to be
carefully fitted. If the old pump only cost as much as is claimed
for the new, we cannot believe it would have commanded in the
market any such price as the new sold for. We must conclude,
therefore, that the cost of production has been much underestimated
by the master. The testimony as reported is very unsatisfactory,
and we are strongly inclined to think all has not been sent here
which was presented. The attention of the parties was evidently
directed much more to the rule of estimating the profits than to
the detail of the expense of manufacture and sale. Had there not
already been two references, we should be inclined to order
another. As it is, we have made the best estimate we can from the
material furnished in the record, and conclude
Page 105 U. S. 258
that a reasonable allowance for profits will be fifteen dollars
on each pump, or $4,470 in all.
The decree will be reversed, and the cause remanded with
instructions to sustain the fifth exception to the report of the
master, and enter a decree against the appellees for $4,470 and
costs; and it is
So ordered.