Respondent University of Illinois Foundation is the owner by assignment of U.S. Patent No. 3,210,767, issued to Dwight E. Isbell on October 5, 1965, for Frequency Independent Unidirectional Antennas, with the application filed on May 3, 1960. The antennas covered are designed for transmission and reception of electromagnetic radio frequency signals used in many types of communications, including the broadcasting of radio and television signals. The patent has been much litigated since it was granted, primarily because it claims a high quality television antenna for color reception. Petitioner Blonder-Tongue Laboratories, Inc. manufactures antennas, and respondent JFD Electronics Corp. is a licensee of the Foundation.
One of the first infringement suits brought by the Foundation was filed in the Southern District of Iowa against the Winegard Co., an antenna manufacturer. After trial to the court and inquiry under Graham v. John Deere Co., Chief Judge Stephenson held the patent invalid as obvious and entered judgment for the alleged infringer. The Court of Appeals for the Eighth Circuit unanimously affirmed, and the Supreme Court denied the patentee's petition for certiorari. The Foundation has filed six infringement actions based on the Isbell patent.
In March 1966, well before the ruling in the Winegard case, the Foundation filed suit in the Northern District of Illinois charging a Chicago customer of petitioner Blonder-Tongue Laboratories, Inc. with infringing the Isbell patent and U.S. Patent No. Re. 25,740, reissued March 9, 1965, to P. E. Mayes et al. Blonder-Tongue chose to subject itself to the jurisdiction of the court to defend its customer and filed an answer and counterclaim asserting that the patents were invalid, that its antennas did not infringe if valid, and other claims including unfair competition, antitrust, and infringement by JFD models.
Trial was to the court, and on June 27, 1968, Judge Hoffman held that the Foundation's patents were valid and infringed, dismissed the unfair competition and antitrust charges, and found claim 5 of the B-T patent obvious and invalid. Before discussing the Isbell patent, Judge Hoffman noted the prior invalidity holding in Winegard but stated the court was free to decide on the evidence before it and determined both patents valid and enforceable.
Blonder-Tongue appealed, and the Court of Appeals for the Seventh Circuit affirmed the findings that the Isbell patent was valid and infringed, affirmed dismissal of the unfair competition and antitrust counterclaims, affirmed the invalidity of claim 5 of the B-T patent, but reversed the finding that the Mayes patent was valid. Blonder-Tongue sought certiorari, assigning as a primary reason the conflict between the Seventh and Eighth Circuits as to the validity of the Isbell patent, and the Supreme Court granted certiorari, subsequently requesting the parties to discuss whether the holding of Triplett v. Lowell should be adhered to and whether the Winegard determination binds the respondents.
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