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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 = '411') AND (category.subclass = '451.1') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '411'; Subclass is '451.1';

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T / S Patent Date Description Patentee Category Assigned To
 1940
U 2,213,425 September 3, 1940 Insulator Fastener
Knob and bracket pin		 YOUNG, Harry M.
 Knob Western Wire Products Co.

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