GALSTON, District Judge.
This is a patent infringement suit in which the infringement of letters patent No. 1,652,262, granted to M. Walter December 13, 1927, for a dumping mechanism for semi-trailers, is involved. The usual defenses of invalidity and noninfringement are urged.
The invention has for its object the construction of means whereby semitrailers which are hauled by tractors may be readily dumped. Since to equip each semitrailer with a dumping mechanism...
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