Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6607119 | Method and apparatus for welding two work pieces | Gerhard Engelhard, Rainer Bauer, Helmar Adams | 2003-08-19 |
| 4698474 | Welding tongs for connecting two abutting pipe ends by arc welding | Siegfried Gügel, Siegfried Forner | 1987-10-06 |
| 4617444 | Burner for wig welding | Gerhard Engelhard, Jürgen Böhm, Siegfried Forner | 1986-10-14 |
| 4577795 | Device for overlay-welding pipes bends | Siegfried Forner, Karl-Heinz Langhammer, Wolfgang Nahr | 1986-03-25 |