|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 = '293') ORDER BY date ASC, patent, type|
Total of 1 patents found where: Class is '264'; Subclass is '293';
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|T / S||Patent||Date||Description||Patentee||Category||Assigned To|
|U||1,731,099||October 8, 1929||Method of Forming a Cement-Receiving Surface on an Insulator Section
Improve cement adhesion by using a special roller tool to form a rough surface similar to that obtained by sanding.
|HARVEY, William F.
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