In this suit for patent infringement plaintiff's ownership of the patents involved (No. 1,905,091, patent to Hanson, and No. 1,972,031, patent to Pierson) is admitted by defendant. The defenses are: (1) Invalidity of patents and (2) non-infringement.
The Hanson Patent.
It seems so obvious that the Hanson patent was anticipated by the Gottschall and Pike patent, No. 1,859,586, that...
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