Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4473596 | Plasma method for coating the inside surface of a glass tube | Hans Beerwald, Gunter Bohm, Manfred Wittmann | 1984-09-25 |
| 4349582 | Gas-discharge method for coating the interior of electrically non-conductive pipes | Hans Beerwald, Gunter Bohm | 1982-09-14 |