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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 = '118') AND (category.subclass = '50') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '118'; Subclass is '50';

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T / S Patent Date Description Patentee Category Assigned To
 1931
U 1,810,424 June 16, 1931 Means for Sealing Insulators
Suspension insulator with metal connectors cemented in the insulator with molten metal under a vacuum to remove entrapped air in the joint		 HAWLEY, Kent A.
 Suspension Locke Insulator Corp.

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