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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 = '403') AND (category.subclass = '291') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '403'; Subclass is '291';

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T / S Patent Date Description Patentee Category Assigned To
 1925
U 1,555,289 September 29, 1925 Insulator
Strain insulator connecting hardware		 JACKSON, Ray P.
 Strain Westinghouse Electric & Mfg. Co.

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