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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 = '74') AND (category.subclass = '553') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '74'; Subclass is '553';

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T / S Patent Date Description Patentee Category Assigned To
 1923
U 1,446,067 February 20, 1923 Method of Connecting Insulator Units
Suspension, method of cementing pin 		REAGAN, Frank H.
 Suspension Locke Insulator Corp.

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