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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 = '409') AND (category.subclass = '73') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '409'; Subclass is '73';

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T / S Patent Date Description Patentee Category Assigned To
 1944
U 2,355,684 August 15, 1944 Insulator Cutting Machine
Machine to automatically trim the profile in insulators in an assembly line process		 SKIPPER, Edward M.
 Machine Locke Insulator Corp.

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