Opinion · Supreme Court of the United States

Keystone Manufacturing Co. v. Adams

151 U.S. 139

Type
Opinion
Court
Supreme Court of the United States
Jurisdiction
Federal
Date
1894-01-08
Topic
general

How later courts describe this case

  • reversing profits award that was based not on what defendant had made from infringement but on what third persons had made from the use of the invention
  • serious difficulties arise in determining measure of damages where "patented invention is but one feature in a machine embracing other devices that contribute to the profits made by the defendant."

Citator

UpLaw has not yet analyzed Keystone Manufacturing Co. v. Adams. The absence of a flag is not a finding that it is good law.

Cited by
114 opinions

Headnotes

  1. Patent Law — Validity The fact that a device has gone into general use and has displaced other devices previously employed for analogous uses does not by itself establish that the later device involves patentable invention, but that fact is always of importance and is entitled to weight in determining whether the machine exhibits patentable invention. 151 U.S. at 141
  2. Patent Law — Validity Where a patented invention consists of an improvement upon machines previously existing, and it appears that in a widely used class of machines, after repeated and futile attempts, a machine has been contrived which accomplishes the desired result, and the Patent Office has granted a patent to the successful inventor, the courts should not adopt a narrow or astute construction fatal to the grant. 151 U.S. at 141
  3. Patent Law — Infringement A patent for a forcing device in cornshellers is not restricted to machines in which the ears of corn drop down a chute to the throat of the sheller; the patented device is equally well adapted to machines in which the chute is dispensed with, and the use of a spiked shaft at the entrance to the throat, revolving in the same direction the corn is running, for the purpose of urging the ears into the sheller, constitutes infringement. 151 U.S. at 142
  4. Patent Law — Damages A complainant who has established the validity of his patent and proved infringement may demand an accounting of the profits actually realized by the defendant from use of the patented device, but the burden of proof rests on the plaintiff to show the amount of profits recoverable.
  5. Patent Law — Damages Where the patented invention is but one feature in a machine embracing other devices that contribute to the profits made by the defendant, the patentee must in every case give evidence tending to separate or apportion the defendant's profits and the patentee's damages between the patented feature and the unpatented features, and such evidence must be reliable and tangible, and not conjectural or speculative. 151 U.S. at 143
  6. Patent Law — Damages The profits an infringer must account for are not those he might reasonably have made but those he did make by use of the plaintiff's invention — that is, the fruits of the advantage he derived from using that invention over what he would have had in using other means then open to the public and adequate to enable him to obtain an equally beneficial result; if there was no such advantage, there can be no decree for profits, and the plaintiff's only remedy is an action at law for damages. 151 U.S. at 143
  7. Patent Law — Damages Where the infringed device was only a portion of the defendant's machine, which embraced inventions covered by patents other than the one infringed, and the plaintiff proves only the profits realized by other similar manufacturers rather than the defendant's own profits, the plaintiff is entitled to nominal damages only, for the burden of proof is on the plaintiff and nothing is more common than for one manufacturing concern to make profits where another, with equal advantages, operates at a loss. 151 U.S. at 144-145