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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 = '248') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '264'; Subclass is '248';

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T / S Patent Date Description Patentee Category Assigned To
 1915
U 1,164,739 December 21, 1915 Method of Making Insulating Devices
Manufacturing technique to make long bushings with petticoats by stacking them on a fired core and fusing the petticoats to the core		 MERSHON, Ralph D.
 Manufacturing  

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