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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 = '156') AND (category.subclass = '303.1') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '156'; Subclass is '303.1';

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T / S Patent Date Description Patentee Category Assigned To
 1925
U 1,543,779 June 30, 1925 Manufacture of Insulators
Suspension glass insulator with pin molded in the glass		 LITTLETON, Jesse T.
FULCHER, Gordon S.
 Suspension Corning Glass Works

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