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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 = '38') AND (category.subclass = '84') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '38'; Subclass is '84';

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T / S Patent Date Description Patentee Category Assigned To
 1925
U 1,538,238 May 19, 1925 Machine for Assembling Insulator Knobs
Machine for assembling nail-knobs, inserting the nail and crimping it so the nail cannot be removed, thus holding the parts together.		 CARPENTER, Alexander
 Manufacturing C. A. C. Automatic Machine Co.

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