|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 = '313') AND (category.subclass = '311') ORDER BY date ASC, patent, type|
Total of 1 patents found where: Class is '313'; Subclass is '311';
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|T / S||Patent||Date||Description||Patentee||Category||Assigned To|
|U||1,273,015||July 16, 1918||Electric Insulator
Suspension made of several parts bolted together
|THOMAS, Percy H.
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