Legal Opinion
Master Metal Strip Service, Inc. v. Protex Weatherstrip Mfg. Co.
Court of Appeals for the Seventh Circuit
Decided July 1, 1948No. 9477PublishedCited by 4 opinions
1Opinion of the Court
SPARKS, Chief Judge.
Plaintiffs charged- defendant, a copartnership, with infringement of United States patents Nos. 2,158,963 and 2,257, 051 issued on the respective dates of May 16, 1939 and September 23, 1941, on applications filed respectively on January 6, 1938, and December 8, 1939. The answer denied infringement and validity of both patents, and a counterclaim asked for a declaratory judgment to that effect, and for a further judgment against plaintiffs for their alleged attempt to monopolize an unpatented element of their combination in violation of the Anti-Trust laws of the United…
2Cases cited4 opinions
- Mercoid Corp. v. Mid-Continent Investment Co.Supreme Court of the United States · 1944
- Cover v. SchwartzCourt of Appeals for the Second Circuit · 1942
- Grant Paper Box Co. v. Russell Box Co.Court of Appeals for the First Circuit · 1945
- Trico Products Corporation v. Anderson Co.Court of Appeals for the Seventh Circuit · 1945
3Cited by4 opinions
- American Sign and Indicator Corp. v. SchulenburgDistrict Court, E.D. Illinois · 1958
- Armstrong v. Emerson Radio and Phonograph Corp.District Court, S.D. New York · 1959
- Lewis E. Hamel Co. v. P & K, Inc.District Court, E.D. Illinois · 1960
- Uarco Inc. v. Moore Business Forms, Inc.District Court, N.D. Illinois · 1969