On June 15, 1942, plaintiff charged Precision Manufacturing Company, Kenneth Larson, and Walter Carlsen with infringement of United States patents to Larson, No. 2,279,792, and to Zimmerman, No. 2,283,888. By amended petition filed November 30, 1942, it further charged infringement of reissue patent No. 22,219 of which patent No. 2,269,503 was the original. These patents were issued, respectively, on...
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