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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 = '313') AND (category.subclass = '3') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '313'; Subclass is '3';

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T / S Patent Date Description Patentee Category Assigned To
 1934
U 1,976,378 October 9, 1934 Aviation Marker
Aviation warning light attached to a suspension insulator		 VROOMAN, Edward C.
 Misc Locke Insulator Corp.

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