RIVES, Circuit Judge.
This appeal is from a judgment holding valid and infringed Claims 1, 2, 4, 5, 6, 7 and 8 of Letters Patent No. 2,493,811, issued to William T. Graham on January 10, 1950, for a "Vibrating Plow and Mounting Therefor".
The principal issues involved are validity and infringement of the Graham patent, though appellants, as manufacturers...
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