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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 = '83') AND (category.subclass = '691') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '83'; Subclass is '691';

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T / S Patent Date Description Patentee Category Assigned To
 1929
U 1,697,434 January 1, 1929 Hole Cutting Machine
Machine for cutting holes in Hewlett type suspension disks for links		 MOORE, JR., Stewart L.
 Manufacturing Locke Insulator Corp.

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