HINCKS, Circuit Judge.
The defendants appeal from an order of the district court which held Claims 3 and 4 of the plaintiff's patent No. 2,149,048 valid and infringed by the defendants. The patent issued on February 28, 1939 to Hyman Freedman, a practicing dentist, on an application filed January 6, 1937.
For upwards of a century, prosthetic dentistry had been groping with the problem of holding dentures in their proper position in the mouth. Various solutions...
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