| 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 = '352') ORDER BY specimen ASC, date, patent, type |
Total of 4 patents found where: Class is '425'; Subclass is '352';
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 |
| 1892 | ||||||
| U | 474,496 | May 10, 1892 | Apparatus for Molding Earthenware, &c. Press to form lateral indentions or wire grooves around the side of the insulator to such as for standard porcelain knobs |
CROSSLEY, Joseph |
Press | |
| 1929 | ||||||
| U | 1,717,996 | June 18, 1929 | Means for and Method of Making Insulators Press method of molding porcelain insulator with vibration improves quality (Hewlett) |
MOORE, JR., Stewart L. |
Press | Locke Insulator Corp. |
| 1936 | ||||||
| U | 2,048,558 | July 21, 1936 | Insulator Plunging Machine Plunging machine to form the shape of bushings and other insulators without the need for turning |
MOORE, Stewart L. |
Manufacturing | Locke Insulator Corp. |
| 1952 | ||||||
| U | 2,582,922 | January 15, 1952 | Apparatus for Molding Articles Press that can be adapted for insulator manufacture |
CROWLEY, Henry L. HOSSENLOPP, Arthur M. |
Press | Henry L. Crowley & Co., Inc. |
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