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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 = '447') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '411'; Subclass is '447';

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T / S Patent Date Description Patentee Category Assigned To
 1922
U 1,427,953 September 5, 1922 Attaching Device
Knob		 HARRISON, Arthur W.
 Knob Porcelain Appliance Corp.

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