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| Graver Tank & Manufacturing Co. v. Linde Air Products Co. ： ウィキペディア英語版 |
Graver Tank & Manufacturing Co. v. Linde Air Products Co.
(詳細は339 U.S. 605 (1950), was an important United States Supreme Court decision in the area of patent law, establishing the propriety of the doctrine of equivalents, and explaining how and when it was to be used.
==Facts==
The plaintiff Linde Air Products Co. owned a patent for an electronic welding process, and sued defendants including the Graver company for infringing the patent. The defendants asserted that they were not infringing the patent because the patented welding process used a welding composition made of alkaline earth metal silicate and calcium fluoride (usually expressed as silicates of calcium and magnesium), while the purported infringers substituted a similar element, manganese, for the patentee's magnesium. The United States district court found infringement, and the Court of Appeals affirmed the infringement claim.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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