WILKIN, District Judge.
The complaint charges infringement of claims 1, 2, 3, and 10 of the Hirst patent No. 1,504,452 for "Improvements in lubricating bolts". The patent was granted August 12, 1924, and assigned to the plaintiff in November, 1935. Such bolts as the patent professed to improve were used principally for lubricating automobile springs, although capable of use in other fields also. They serve two functions: they hold the leaves of the spring together...
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