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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 = '40') AND (category.subclass = '617') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '40'; Subclass is '617';

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T / S Patent Date Description Patentee Category Assigned To
 1921
U Specimen known 1,381,594 June 14, 1921 Strain-Insulator Sign
Combination strain insulator and sign to indicate voltage, etc. Car-Stop They were made by the American Porcelain Co.		 SAUEREISEN, Christian F.
 Strain  

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