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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 = 'DIG.50') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '264'; Subclass is 'DIG.50';

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T / S Patent Date Description Patentee Category Assigned To
 1933
U 1,925,211 September 5, 1933 Art of Assembling Insulators
Method of cementing pin in suspension insulator to remove air		 SMITH, William A.
 Suspension The Ohio Brass Co.

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