Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5830312 | Butt fusion apparatus with clamping jaws for clamping pipe to be fused without interference between the clamps and the pipe | James Callen Weimer, Jack Lee Workman | 1998-11-03 |
| 5743992 | Butt fusion apparatus with constant pressure accumulator | James Callen Weimer, Jack Lee Workman | 1998-04-28 |
| 5692285 | Butt fusion apparatus with means for changing quickly between straight pipe and pipe fitting attachment positions, and method | James Collen Weimer, Jack Lee Workman | 1997-12-02 |