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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 = '138') ORDER BY date ASC, patent, type

Total of 3 patents found where: Class is '264'; Subclass is '138';

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T / S Patent Date Description Patentee Category Assigned To
 1931
U 1,808,105 June 2, 1931 Insulator Cutter and Method of Treating Insulators
Manufacturing method to cut out the top and bottom recess of a Hewlett suspension disk and ready for cutting the holes for link passages
GOUVERNEUR, Minor F. H.
Manufacturing Locke Insulator Corp.
 1941
U 2,234,391 March 11, 1941 Method of Manufacturing Electric Insulators
Method of making station post insulators with metal caps
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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