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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 = '264') AND (category.subclass = '264') ORDER BY date ASC, patent, type

Total of 2 patents found where: Class is '264'; Subclass is '264';

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T / S Patent Date Description Patentee Category Assigned To
 1928
U 1,657,922 January 31, 1928 Method of Assembling Insulators
Sprayed coating of metal or asphalt with heat treatment to improve cement joint		 GODDARD, Walter T.
 Cement Locke Insulator Corp.
 1931
U 1,816,023 July 28, 1931 Method of Manufacturing Insulators
Method of assembling multipart insulators with wet cement and maintaining an ambient humidity and simulataneously cooling down.		 OSBORNE, David Henry
 Manufacturing Electric Service Supplies Co.

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