THOMSON, District Judge.
This case involves the question of validity and infringement of claim 2 of patent No. 1,377,023, of Bernard S. Nelson, for which a patent issued May 3, 1921. The invention relates to lubricating devices, and more especially to that class of articles known in the trade as "grease guns," which are used for the purpose of quickly and easily supplying a regulated quantity of lubricant to parts of automobiles and other mechanism receiving periodic...
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