|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 = '324.1') ORDER BY date ASC, patent, type|
Total of 4 patents found where: Class is '425'; Subclass is '324.1';
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|T / S||Patent||Date||Description||Patentee||Category||Assigned To|
|U||1,779,811||October 28, 1930||Method of Manufacturing Insulators
Press for making skirts/petticoats in one-piece porcelain (replaces casting)
|HARVEY, William F.
|U||2,034,707||March 24, 1936||Apparatus for Making One-Piece Insulators
Machine to press out the form and trim the profile in large unipart insulators
|BENARD, Arthur G.
||Manufacturing||Locke Insulator Corp.|
|U||2,068,941||January 26, 1937||Process and Apparatus for Manufacturing Insulators
Plunger to first form the pinhole in a porcelain insulator by first plunging a pinhole without threads then form the threads
|BOVARD, Floyd G.
||Press||The Ohio Brass Co.|
|U||2,395,295||February 19, 1946||Method of Producing Insulators
Improved method of jiggering and plunging
|ROWLAND, Davidge H.
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