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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 = '254') AND (category.subclass = '389') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '254'; Subclass is '389';

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T / S Patent Date Description Patentee Category Assigned To
 1954
U 2,684,228 July 20, 1954 Electric Line Stringing Device
Metal shaped like an open circle mounted temporarily on a corner pin to allow easy stringing of the line without possible injury to linemen.		 DION, Francois Emile
 Miscellaneous  

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