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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 = '83') AND (category.subclass = '333') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '83'; Subclass is '333';

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T / S Patent Date Description Patentee Category Assigned To
 1875
U 160,016 February 23, 1875 Improvement in Paper Perforating Machines
Machine for perforating paper glass etching patterns		 HEMINGRAY, Robert
 HI  

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