Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4850735 | Latching mechanism with integral key member | Paul D. Hansen, William J. Schmidt | 1989-07-25 |
| 4780924 | Tooth brush with removable brush head | Paul D. Hansen, William J. Schmidt | 1988-11-01 |