DAVIS, Circuit Judge.
King Instrument Corporation (King), the plaintiff below, charged Otari Corporation (Otari) with infringement of its U.S. Patent Nos. 3,637,153 ('153) issued January 25, 1972, and 3,737,358 ('358) issued June 5, 1973. King now appeals from final judgment by the United States District Court for the Northern District of California, following a bench trial, that held the '358 patent invalid because the invention claimed was found to be "on sale"...
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