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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 = '33') AND (category.subclass = '30.2') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '33'; Subclass is '30.2';

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T / S Patent Date Description Patentee Category Assigned To
 1924
U 1,506,863 September 2, 1924 Suspension Insulator
Suspension with metal cap on top and underneath		 PLIMPTON, Bentley A.
 Suspension  

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