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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 = '131') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '131';

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T / S Patent Date Description Patentee Category Assigned To
 1944
U 2,352,756 July 4, 1944 Ash Tray
Ash tray		 ANHOLT, Harry M.
 "HU, OU"  

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