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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 = '403') AND (category.subclass = '389') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '403'; Subclass is '389';

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T / S Patent Date Description Patentee Category Assigned To
 1906
U 830,572 September 11, 1906 Clamp for Electrical Conductors
Clamp to connect the ends of conductors (also Canadian patent 104766, April 16, 1907)		 CUTTER, Scott C.
 Clamp  

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