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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 = '24') AND (category.subclass = '509') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '24'; Subclass is '509';

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T / S Patent Date Description Patentee Category Assigned To
 1914
U 1,090,686 March 17, 1914 Insulator Clamp
Self-tying via clamp		 COOK, William A.
 Self-tying Miscellaneous  

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