Legal Opinion
Key Pharmaceuticals v. Hercon Laboratories Corporation
Court of Appeals for the Federal Circuit
Decided January 8, 1999No. 98-1067, 98-1180PublishedCited by 256 opinions
1Opinion of the Court
PLAGER, Circuit Judge.
This is an appeal from a patent infringement action in which Key Pharmaceuticals, Inc. (“Key”) charged Hereon Laboratories Corporation (“Hereon”) with infringement of its U.S. Patent No. 5,186,938 (“ ’938 patent” or “the patent”). Hereon, in addition to denying infringement, counterclaimed that the patent is invalid and unenforceable. Following a bench trial, the United States District Court for the District of Delaware concluded that Hereon infringed the patent and that it failed to prove the patent invalid or unenforceable, and entered a final judgment to that effect.…
2Cases cited16 opinions
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- Vitronics Corporation v. Conceptronic, Inc.Court of Appeals for the Federal Circuit · 1996
- Cybor Corporation v. Fas Technologies, Inc., and Fastar Ltd., Defendants-CrossCourt of Appeals for the Federal Circuit · 1998
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3Cited by256 opinions
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- Helifix Limited v. Blok-Lok, Ltd. And William Scott Burns v. Helifix North America Corporation, Third Party CounterclaimCourt of Appeals for the Third Circuit · 2000
- Northern Telecom Limited v. Samsung Electronics Co., Ltd. And Samsung Semiconductor, Inc., Defendants-CrossCourt of Appeals for the Federal Circuit · 2000
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