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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 = 'DIG.58') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '425'; Subclass is 'DIG.58';

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T / S Patent Date Description Patentee Category Assigned To
U 474,496 May 10, 1892 Apparatus for Molding Earthenware, &c.
Press to form lateral indentions or wire grooves around the side of the insulator to such as for standard porcelain knobs

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