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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 = '248') AND (category.subclass = '346.01') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '248'; Subclass is '346.01';

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T / S Patent Date Description Patentee Category Assigned To
 1880
U 228,962 June 15, 1880 Musical Instrument Insulator
Glass insulator for piano legs		 WEIR, Charles S.
 Piano  

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