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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 = '193') ORDER BY date ASC, patent, type

Total of 3 patents found where: Class is '425'; Subclass is '193';

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T / S Patent Date Description Patentee Category Assigned To
 1927
U 1,640,514 August 30, 1927 Press for Forming Plastic Materials
Press for forming threads in wet process porcelain
MUELLER, Ferdinand C. H.
Press Findlay Electric Porcelain Co.
 1930
U 1,784,792 December 9, 1930 Apparatus for Making Insulators
Manufacturing method that replace casting large unipart insulators with a means to press out the entire form of the insulator
HAWLEY, Kent A.
Manufacturing Locke Insulator Corp.
 1943
U Specimen known 2,336,864 December 14, 1943 Apparatus For Forming Insulators
CD 1030: Wireholder made of glass, press for making the design
HOLMES, Minot K.
Insulator Owens-Illinois Glass Co.

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