OPINION AND ORDER
JAMES E. DOYLE, District Judge.
This is an action for infringement of Patent No. 2,580,306 issued December 25, 1951, on an application filed September 5, 1945, by Elbert C. Leach, Otto F. Manthie, and George D. Clapp. This action was commenced in this court on February 13, 1961. On April 15, 1966, a supplemental complaint was filed in which infringement by defendant's modified or screw-fed impeller machine was charged. Prior to trial several...
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