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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 = '439') AND (category.subclass = '894') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '439'; Subclass is '894';

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T / S Patent Date Description Patentee Category Assigned To
 1932
U 1,873,750 August 23, 1932 Insulator Structure
Strain insulator with parts coated and metal fitting soldered to the coating		 FORTESCUE, Charles Le G.
 Strain Westinghouse Electric & Mfg. Co.

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