Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5291768 | Plastic key tag with a key bar | Robert Rieffel | 1994-03-08 |
| 4790036 | Method and device for the automatic cleaning of a toilet seat | Jean-Jacques Asper, Erwin Zurcher, Erika Schnyder | 1988-12-13 |