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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 = '439') AND (category.subclass = '801') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '439'; Subclass is '801';

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T / S Patent Date Description Patentee Category Assigned To
 1951
U 2,564,340 August 14, 1951 Clamp for Electrical Conductors
Metal clamp to secure the conductor to the bottom of the string of suspension insulators		 OSBORNE, David H.
 Suspension Porcelain Insulator Co.

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