SYMES, District Judge.
This is a patent suit based on United States letters patent No. 2,144,491, granted January 17, 1939 to plaintiff, George J. Heberlein, application filed April 29, 1937, for certain new and useful improvements in weed burners.
The prayer is (a), said letters patent be declared valid and plaintiff to be the lawful owner thereof; and (b), the defendants be adjudged to have infringed claim 6 thereof.
The defendants plead the general...
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