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 = '267') ORDER BY specimen DESC, date, patent, type |
Total of 4 patents found where: Class is '425'; Subclass is '267';
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T / S | Patent | Date | Description | Patentee | Category | Assigned To |
1916 | ||||||
U | 1,193,185 | August 1, 1916 | Machine for Internally Shaping Telegraph Insulators and the Like Machine to cut out and shape the internals of an insulator |
PODMORE, William |
Press | 1/2 to Henry Lewis Doulton |
1925 | ||||||
U | 1,553,356 | September 15, 1925 | Machine for Producing Threads or Grooves in Plastic Articles Threading method whereby mandrel rotates (similar to Lapp wobbler method) |
BENNETT, Cornelius Van Dyke |
Thread | The Porcelain Insulator Corp. |
U | 1,567,027 | December 29, 1925 | Insulator Threading Machine Machine to form threads in plastic clay |
BENNETT, Cornelius Van Dyke |
Press | The Porcelain Insulator Corp. |
1933 | ||||||
U | 1,937,184 | November 28, 1933 | Jigger Jiggering machine using centrifugal force to cut out the interior of bushings |
AUSTIN, Arthur O. |
Manufacturing | The Ohio Brass Co. |
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