Legal Opinion
Lear Siegler, Inc., Plaintiff/cross-Appellant v. Sealy Mattress Company of Michigan, Inc., Hoover Universal, Inc. And Hoover Group, Inc.
Court of Appeals for the Federal Circuit
Decided June 30, 1989No. 88-1540, 88-1562PublishedCited by 88 opinions
1Opinion of the Court
MICHEL, Circuit Judge.
Sealy Mattress Company of Michigan, Inc., Hoover Universal, Inc., and Hoover Group, Inc. (Sealy) appeal the judgment of the United States District Court for the Eastern District of Michigan, Civil Action No. 84-CV-75319-DT (August 21, 1987), entered in response to a jury verdict that the claims of the patents in suit are infringed under the doctrine of equivalents by Sealy. The jury awarded the patent as-signee, Lear Siegler, Inc. (LSI), $2.8 million in damages. We reverse.
Background
On November 20, 1984, LSI sued Sealy for infringement of LSI’s U.S. Patent No. 3,825,960,…
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