Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5504958 | Electric toothbrush | — | 1996-04-09 |
| 5311633 | Electric power driven toothbrush | Gustav Gassner | 1994-05-17 |
| 4577944 | Lens mount with noise reducing means | Siegfried Grosser, Christian Ludwig, Kurt Wallner, Eugen Bayerl | 1986-03-25 |