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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 = '412') ORDER BY specimen ASC, date, patent, type

Total of 1 patents found where: Class is '411'; Subclass is '412';

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T / S Patent Date Description Patentee Category Assigned To
 1930
U 1,750,769 March 18, 1930 Insulator Pin
Steel pin with rolled threads and support on top of crossarm		 AUSTIN, Arthur O.
 Pin The Ohio Brass Co.

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