No. 91-1017.

936 F.2d 1261 (1991)

SONOSCAN, INC., Plaintiff-Appellant, v. SONOTEK, INC., Defendant-Appellee.

United States Court of Appeals, Federal Circuit.

June 12, 1991.

Attorney(s) appearing for the Case

Thomas E. Dorn, Kinzer, Plyer, Dorn, McEachran & Jambor, Chicago, Ill., argued for plaintiff-appellant. With him on the brief was Peter G. Mack, Foley & Lardner, Schwartz, Jeffrey, Schwab, Mack, Blumenthal & Evans, Alexandria, Va., of counsel.

Robert M. Mason, Jones, Day, Reavis & Pogue, Dallas, Tex., argued for defendant-appellee. With him on the brief was Hal D. Cooper, Jones, Day, Reavis & Pogue, Cleveland, Ohio.

Before LOURIE, CLEVENGER and RADER, Circuit Judges.

LOURIE, Circuit Judge.

This is an appeal from the August 30, 1990, judgment of the United States District Court for the Eastern District of Virginia in which the district court held that appellant's U.S. Patent 4,866,986 is invalid under 35 U.S.C. § 102(b) (1988) on the ground that the patented invention had been placed on sale more than one year prior to the filing date of the application for patent. Sonoscan, Inc. v. Sonotek, Inc., 17 USPQ2d 1247 (E...


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