Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4536636 | Method and machine for electrical resistance roll seam welding with a single electrode-wire | Paul Opprecht, Wolfgang Weil | 1985-08-20 |
| 4493962 | Apparatus and method to suppress oxidation during resistance welding | Wolfgang Weil, Andres Lanz, Max Vogt, Paul Meier, Hanspeter Fankhauser | 1985-01-15 |
| 4395614 | Apparatus to suppress oxidation during resistance welding | Wolfgang Weil, Andres Lanz, Max Vogt, Paul Meier, Hanspeter Fankhauser | 1983-07-26 |