Legal Opinion
Environmental Instruments, Inc. v. Sutron Co.
District Court, E.D. Virginia
Decided May 19, 1988No. Civ. A. 87-577-APublishedCited by 3 opinions
1Opinion of the Court
MEMORANDUM OPINION
ELLIS, District Judge.
INTRODUCTION
Plaintiff, Environmental Instruments, Inc. (Eli), brings suit alleging patent infringement by the defendant, Sutron Company (Sutron). Specifically, Eli asserts that Sutron infringed upon Ell’s patent for a “Thermal Directional Fluid Flow Transducer,” United States Patent No. 3,900,819 (hereinafter the ’819 patent). Sutron responds that the ’819 patent is void, and seeks to have it, as well as Ell’s patent for a “Directional Fluid Flow Transducer,” United States Patent No. 3,995,481 (hereinafter the ’481 patent), declared invalid. Moreover,…
2Cases cited28 opinions
- Graham v. John Deere Co. of Kansas CitySupreme Court of the United States · 1966
- Graver Tank & Mfg. Co. v. Linde Air Products Co.Supreme Court of the United States · 1950
- Walker Process Equipment, Inc. v. Food MacHinery & Chemical Corp.Supreme Court of the United States · 1965
- Sri International v. Matsushita Electric Corporation of America and Matsushita Electric Industrial Co., Ltd.Court of Appeals for the Federal Circuit · 1985
- Loctite Corporation, Appellant/cross-Appellee v. Ultraseal Ltd., Appellees/cross-AppellantsCourt of Appeals for the Federal Circuit · 1985
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3Cited by3 opinions
- Environmental Instruments, Inc. v. The Sutron Corporation, Defendant/cross-AppellantCourt of Appeals for the Federal Circuit · 1989
- EGLESTON v. McCLENDONCourt of Civil Appeals of Oklahoma · 2013
- Welsh v. Rockmaster Equipment Manufacturing Inc.District Court, E.D. Texas · 1998