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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 = '812') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '425'; Subclass is '812';

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T / S Patent Date Description Patentee Category Assigned To
 1933
U 1,929,737 October 10, 1933 Apparatus for Molding Insulators
Die to hot press to form an insulator for street lights with one part of the mold rotating and a stationary part to form petticoats with integral lugs (see 2,007,567)		 FISCHER, Eugene H.
 Manufacturing The Harford Faience Co.

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