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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 = '200') AND (category.subclass = '48P') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '200'; Subclass is '48P';

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T / S Patent Date Description Patentee Category Assigned To
 1914
U 1,109,586 September 1, 1914 Line Disconnecting Switch
Switch to disconnect line for repairs. Composed of several multipart insulators, knife switch, and handles near the ground to operate the switch.		 HEWLETT, Edward M.
 Switch General Electric Co.

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