GALSTON, District Judge.
This is a patent infringement suit involving the validity and the infringement of patent No. 1,482,151 granted January 29, 1924, to H. Rosenberg for a metallic fastener.
The device of the patent is a screw type of fastener for securing metal plates together with such an interlocking of the engaged parts as to resist removal of the screw.
The screw is a cylindrical body having multiple, high-pitched threads, with a head at its...
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