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PREEMPTION DEVICES v. MINNESOTA MIN. AND MFG. CO.

Civ. A. No. 80-0268.

559 F.Supp. 1250 (1983)

PREEMPTION DEVICES, INC. v. MINNESOTA MINING AND MANUFACTURING CO.

United States District Court, E.D. Pennsylvania.

March 18, 1983.

Attorney(s) appearing for the Case

Zachary T. Wobensmith, III, Wobensmith & Wobensmith, Philadelphia, Pa., for plaintiff.

Joel S. Goldhammer, Seidel, Gonda, Goldhammer & Pautich, P.C., Philadelphia, Pa., for defendant.

MEMORANDUM

GILES, District Judge.

Preemption Devices, Inc. ("PDI") seeks a declaration that United States Patent No. RE 28,100 is invalid. Minnesota Mining and Manufacturing Company ("3M"), the holder of the patent, counterclaims, alleging infringement. PDI admits that if the patent is valid, it is guilty of infringement. However, in support of the patent's invalidity, PDI raises five arguments: (1) the invention was on sale in the United States for more...

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