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STEWART-WARNER CORP. v. CITY OF PONTIAC, MICH.

Nos. 81-1611, 81-1631.

717 F.2d 269 (1983)

STEWART-WARNER CORPORATION, Plaintiff-Appellant, Cross-Appellee, v. The CITY OF PONTIAC, MICHIGAN, and American Sign & Indicator Corporation, Defendants-Appellees, Cross-Appellants.

United States Court of Appeals, Sixth Circuit.

Decided September 2, 1983.

Attorney(s) appearing for the Case

Alfonse J. D'Amico, Barnes, Kisselle, Raisch & Choate, Detroit, Mich., Melvin M. Goldenberg (argued), McDougall, Hersh & Scott, Chicago, Ill., for plaintiff-appellant, cross-appellee.

William J. Coughlin, Harness, Dickey & Pierce, Birmingham, Mich., William L. Anthony, Jr. (argued), Palo Alto, Cal., for defendants-appellees, cross-appellants.

Before MERRITT, KENNEDY and MARTIN, Circuit Judges.

MERRITT, Circuit Judge.

Plaintiff appeals from the District Court's judgment granting defendants' motion for directed verdict in this infringement suit involving two patents for large stadium scoreboards with matrices of light bulbs displaying moving images. The essential holding of the District Court was that the plaintiff lost its patent monopoly over the two inventions because it put the invention on the market more than a year before its two patent applications...

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