| 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 = '420') ORDER BY date ASC, patent, type |
Total of 7 patents found where: Class is '425'; Subclass is '420';
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 |
| 1902 | ||||||
| U | 716,343 | December 16, 1902 | Machine for Forming the Interiors of Plastic Materials Press for making porcelain insulators |
LOCKE, Fred M. |
Press | |
| 1905 | ||||||
| U | 788,120 | April 25, 1905 | Press for Plastic Material Insulator press for forming the bottom shell and threaded pinhole of multipart porcelain insulators (Thomas blue jean seam impression in bottom skirt) |
THOMAS, George W. |
Press | The R. Thomas & Sons Co. |
| 1906 | ||||||
| U | 811,602 | February 6, 1906 | Mold for Plastic Materials Press mold for forming insulators |
WATTS, Arthur S. |
Press | The Locke Insulator Mfg. Co. |
| 1909 | ||||||
| R | 12,934 | April 6, 1909 | Die for Forming Insulators Press die for forming insulators (reissue of patent 838,727) |
LOCKE, Fred M. |
Press | |
| 1915 | ||||||
| U | 1,157,612 | October 19, 1915 | Die for Insulators Plunger to form suspension petticoats and threaded pinhole |
BENNETT, Cornelius Van Dyke |
Plunger | Locke Insulator Mfg. Co. |
| 1935 | ||||||
| U | 2,007,567 | July 9, 1935 | Apparatus for Molding Insulators Machine for hot pressing porcelain box for street lights in one operation the interior surface with a rotating die and the exterior irregular surface with lugs with a stationary die (see 1,929,737) |
FISCHER, Eugene H. |
Manufacturing | Westinghouse Electric & Mfg. Co. |
| 1947 | ||||||
| U | 2,415,462 | February 11, 1947 | Ceramic Molding Press Vacuum molding of clay articles such as insulators. This may be the patent used by Locke to make their ""vacuum dry pressing"" porcelain insulators. |
CHERRY, George L. VEALE, Charles C. |
Press | Western Electric Co. |
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