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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 = '546') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '411'; Subclass is '546';

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T / S Patent Date Description Patentee Category Assigned To
 1908
U 880,121 February 25, 1908 Electrical Insulator
Knob wiring insulator composed of two or more discs to secure individual wires from each other and the supporting nail or screw.		 BOLTON, Daniel G.
 Knob  

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