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SELECT DISTINCT patent.*, YEAR(date) as year FROM patent LEFT JOIN category ON category.patent = patent.patent AND category.type = patent.type WHERE (category.class = '264') AND (category.subclass = '678') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '264'; Subclass is '678';

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T / S Patent Date Description Patentee Category Assigned To
 1946
U 2,395,295 February 19, 1946 Method of Producing Insulators
Improved method of jiggering and plunging		 ROWLAND, Davidge H.
 Manufacturing  

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