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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 = '216') AND (category.subclass = '97') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '216'; Subclass is '97';

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T / S Patent Date Description Patentee Category Assigned To
 1934
U 1,975,297 October 2, 1934 Insulator
Suspension disk strengthen by acid etching glass under cap		 SHAVER, William W.
 Suspension Corning Glass Works

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