| 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 = '264') AND (category.subclass = '312') ORDER BY date ASC, patent, type |
Total of 3 patents found where: Class is '264'; Subclass is '312';
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 |
| 1904 | ||||||
| U | 774,765 | November 15, 1904 | Art and Method of Manufacturing Earthenware Insulators Earthenware, manufacture of |
LOCKE, Fred M. |
Earthenware | |
| 1905 | ||||||
| U | 790,214 | May 16, 1905 | Method of Manufacturing High Potential Earthenware Insulators Earthenware, manufacture of hi-potential insulators |
LOCKE, Fred M. |
Earthenware | |
| 1947 | ||||||
| U | 2,425,270 | August 5, 1947 | Method and Apparatus for Forming Blanks for Post and Pedestal Insulators Manufacturing method to produce blanks for post and pedestal insulators |
SKIPPER, Edward M. |
Manufacturing | Locke Insulator Corp. |
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