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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 = '469') ORDER BY date ASC, patent, type

Total of 2 patents found where: Class is '425'; Subclass is '469';

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T / S Patent Date Description Patentee Category Assigned To
U 838,727 December 18, 1906 Die for Forming Insulators
Press to form petticoats - improvement on 716,343 (see reissue 12,934 on 6-4-1909)
LOCKE, Fred M.
U 1,198,732 September 19, 1916 Plunger for Forming Insulators
Plunger with holes to release pressure (see 838,727 and reissue 12,934)
LOCKE, Louis Peer
Plunger Locke Insulator Mfg. Co.

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