United States v. Esnault-Pelterie

Background

An inventor sued the federal government seeking money after the United States used and built a device the inventor said his patent covered: a control for keeping an airplane balanced. The Court of Claims originally found the patent valid and that the Government’s three airplanes infringed it; that judgment was reviewed by the Supreme Court, which sent the case back for clearer factual findings. The Court of Claims then added specific findings that several claims of the patent were valid and infringed.

Reasoning

The Supreme Court examined whether it could overturn those findings without the trial testimony in the record. The Court explained that under the statute and longstanding practice, the Court of Claims must make ultimate factual findings and those findings are treated like a jury verdict. Because the lower court’s findings rested on evidence and expert testimony that are not before the Supreme Court, the Court would not reweigh that testimony or substitute its judgment. The Court therefore upheld the Court of Claims’ conclusion that the specified patent claims were valid and had been infringed, allowing the inventor to recover compensation.

Real world impact

The ruling means the inventor can recover money from the Government for use and manufacture of the airplane control device identified in the findings. It also confirms that on appeal to the Supreme Court, factual findings by the Court of Claims usually stand when the underlying testimony is not part of the record. That limits the scope of appellate review in similar government patent suits.

Dissents or concurrances

One Justice dissented, arguing the findings did not show a valid patent or infringement because the claimed parts and their combination were already in general use before the inventor’s asserted claim.