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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 = '315') AND (category.subclass = '58') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '315'; Subclass is '58';

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T / S Patent Date Description Patentee Category Assigned To
 1923
U 1,449,694 March 27, 1923 Protective Device
Protective device to prevent arcing		 PEEK, JR., Frank W.
 Miscellaneous General Electric Co.

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