|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 = '337') AND (category.subclass = '283') ORDER BY date ASC, patent, type|
Total of 1 patents found where: Class is '337'; Subclass is '283';
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|T / S||Patent||Date||Description||Patentee||Category||Assigned To|
|U||552,680||January 7, 1896||Electric Cut-Out and Insulator
Cut-out for transformer mounted on and integral to the transformer. (see patent 538,090)
|WAGNER, Robert A.
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