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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 = '29') AND (category.subclass = '247') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '29'; Subclass is '247';

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T / S Patent Date Description Patentee Category Assigned To
 1932
U 1,891,708 December 20, 1932 Insulator Cotter and Mode of Use
Suspension insulator cap and cotter pin permanent assembled that cannot be removed except with a special device
GALLOWAY, Howard L.
Suspension Locke Insulator Corp.

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