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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 = '156') AND (category.subclass = '559') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '156'; Subclass is '559';

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T / S Patent Date Description Patentee Category Assigned To
 1934
U 1,944,134 January 16, 1934 Insulator Assembling Machine
Machine to press on and turn cap to secure the cement and cement in the metal pin		 ROBERTSON, John Cullen
 Manufacturing Locke Insulator Corp.

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