| 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 = '65') AND (category.subclass = '348') ORDER BY date ASC, patent, type |
Total of 3 patents found where: Class is '65'; Subclass is '348';
View a patent by clicking on the patent number. You can sort by any of the columns by clicking on the column name.
| T / S | Patent | Date | Description | Patentee | Category | Assigned To |
| 1941 | ||||||
| U | 2,254,227 | September 2, 1941 | Glass Tempering Method and Apparatus Glass tempering of suspension insulators in a controlled manner |
LEWIS, Evan J. |
Glass | Corning Glass Works |
| 1947 | ||||||
| U | 2,418,713 | April 8, 1947 | Thermally Toughened Insulator CD 228.5: tempering the surface of glass insulators for added strength |
HOLMES, Minot K. PLUMMER, Jesse H. |
Insulator | Owens-Illinois Glass Co. |
| 1961 | ||||||
| U | 2,978,839 | April 11, 1961 | Apparatus for Finishing Apertured Glass Articles Fire polishing of holes for thru hole insulators CD 1049 |
EASTUS, Harold L. HIATT, Earl |
Manufacturing | Kimble Glass Co. |
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