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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 = '57') AND (category.subclass = '213') ORDER BY date ASC, patent, type

Total of 2 patents found where: Class is '57'; Subclass is '213';

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T / S Patent Date Description Patentee Category Assigned To
U 950,454 February 22, 1910 Lightning Rod
Conductor cable made by spiralling one wire around a straight wire and making a cable using multiple pairs
MOORE, George J.
Lightning Rod Moore Brothers Lightning Rod Co.
U 1,135,940 April 13, 1915 Lightning Rod Cable
Flexible lightning rod conductor made of twisted and spiralled wire cable
JUEL, Peter J.
Lightning Rod H. S. Rottenborg and H. C. Hansen

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