FAIRCHILD, Chief Judge.
This is a suit charging infringement of plaintiff-appellant Red Cross Manufacturing Corporation's Lautzenheiser United States Patent No. 3,593,930, issued July 21, 1971, on an application filed September 11, 1970 in the name of the assignor-inventor Robert D. Lautzenheiser. The patent in suit is directed to a lawn and garden shredding machine (hereinafter vertical shaft shredder) in which two or more cutting blades are rotated within a shredding...
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