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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 = '428') AND (category.subclass = '931') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '428'; Subclass is '931';

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T / S Patent Date Description Patentee Category Assigned To
 1887
U 364,605 June 7, 1887 Lightning Rod
Lightning rod composed of a hollow core wrapped with small hollow wire which has been wrapped with soft wire and the whole encsed in a copper covering		 SCHOONMAKER, James H.
 Lightning Rod 2/3 to Henderson D. Morse and Nathaniel C. Gault

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