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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 = '425') AND (category.subclass = '231') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '425'; Subclass is '231';

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T / S Patent Date Description Patentee Category Assigned To
 1908
U 894,623 July 28, 1908 Apparatus for Molding Porcelain Ware
Press for molding small dry process insulators such as nail-knobs, etc.		 GEISENHONER, Henry
 Press General Electric Co.

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