| 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 = '418') ORDER BY date ASC, patent, type |
Total of 10 patents found where: Class is '425'; Subclass is '418';
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 | |
| 1917 | ||||||
| U | 1,226,795 | May 22, 1917 | Insulator Press Insulator press |
NEWBY, William |
Press | William I. Lourie |
| 1925 | ||||||
| U | 1,556,440 | October 6, 1925 | Press for Making Insulators and the Like Press for forming threads in porcelain insulators and to prevent damaging the threaded pinhole once formed |
HIBBARD, Robert L. |
Press | |
| 1927 | ||||||
| U | 1,625,514 | April 19, 1927 | Apparatus for Forming Plastic Materials Improved press to form insulator shape from wet process clay and cut in threaded pinhole |
AUSTIN, Arthur O. MACLEOD, Donald Keith |
Press | The Ohio Brass co. |
| U | 1,640,514 | August 30, 1927 | Press for Forming Plastic Materials Press for forming threads in wet process porcelain |
MUELLER, Ferdinand C. H. |
Press | Findlay Electric Porcelain Co. |
| 1928 | ||||||
| U | 1,663,329 | March 20, 1928 | Forming and Tapping Machine Machine to form threads in plastic clay bodies |
AUSTIN, Arthur O. |
Manufacturing | The Ohio Brass Co. |
| 1933 | ||||||
| U | 1,929,737 | October 10, 1933 | Apparatus for Molding Insulators Die to hot press to form an insulator for street lights with one part of the mold rotating and a stationary part to form petticoats with integral lugs (see 2,007,567) |
FISCHER, Eugene H. |
Manufacturing | The Harford Faience Co. |
| 1934 | ||||||
| U | 1,978,627 | October 30, 1934 | Vibrating Plunging Machine Manufacturing method using a vibrating plunger tool to form the underside shape of the insulator without causing stresses in the finished porcelain |
GOUVERNEUR, Minor F. H. |
Manufacturing | Locke Insulator Corp. |
| 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. |
| 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. |
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