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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 = '632') ORDER BY date ASC, patent, type

Total of 2 patents found where: Class is '264'; Subclass is '632';

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T / S Patent Date Description Patentee Category Assigned To
 1939
U 2,142,422 January 3, 1939 Insulator and Method of Manufacturing the Same
Method of making station post insulators with hollow cavity and filling cavity with dry gas		 TAYLOR, John J.
 Insulator The Ohio Brass Co.
 1946
U 2,395,295 February 19, 1946 Method of Producing Insulators
Improved method of jiggering and plunging		 ROWLAND, Davidge H.
 Manufacturing  

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