Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5279993 | Gas injection stone and process of manufacture thereof | Hans Rothfuss, Herbert Metzger, Manfred Winkelmann | 1994-01-18 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5279993 | Gas injection stone and process of manufacture thereof | Hans Rothfuss, Herbert Metzger, Manfred Winkelmann | 1994-01-18 |