Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5459297 | Method and apparatus for manufacturing a texture drum | Wolfgang Boppel, Gerald Sermund | 1995-10-17 |
| 5438179 | Method and apparatus for manufacturing texture drums | Wolfgang Boppel, Gerald Sermund | 1995-08-01 |
| 5324912 | Method and apparatus for manufacturing a texture drum | Wolfgang Boppel, Gerald Sermund | 1994-06-28 |