Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857701 | Internal welding head assembly | — | 1989-08-15 |
| 4635839 | Welding carriage | — | 1987-01-13 |
| 4631386 | Welding head apparatus | — | 1986-12-23 |
| 4597335 | Track for welding carriage and locator apparatus therefor | — | 1986-07-01 |
| 4525616 | Internal pipe welding apparatus | — | 1985-06-25 |
| 4306134 | Arc welding pipe apparatus | Edward A. Clavin, James E. Alleman, Henry Ray, Edgar H. Douglas | 1981-12-15 |
| 4293758 | Welding apparatus including means for depositing the weld metal along parallel paths | Edward A. Clavin, James E. Alleman | 1981-10-06 |
| 4285458 | Welding backup shoe apparatus | — | 1981-08-25 |
| 4286138 | Welding methods and apparatus including alternate weld metal depositions along opposite sides of a weld | Edward A. Clavin | 1981-08-25 |
| 4260869 | Traveling welding carriage | Edward A. Clavin | 1981-04-07 |
| 4253599 | Pipe welding clamp including pipe end spacing means | — | 1981-03-03 |
| 4250813 | Track apparatus | Edward A. Clavin | 1981-02-17 |
| 4195763 | Apparatus for locating welding carriage track | — | 1980-04-01 |