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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 = '346.5') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '248'; Subclass is '346.5';

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T / S Patent Date Description Patentee Category Assigned To
 1874
U 150,112 April 21, 1874 Improvement in Piano Forte Insulators
Glass cup to insulate a piano leg from sending musical vibrations to the floor		 VIGNERON, Charles
 Piano  

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