Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5788045 | Empty bottle collector | Hans-Hermann Trautwein | 1998-08-04 |
| 5721774 | Longitudinally balanced, dual voltage line-feed circuit | — | 1998-02-24 |
| 5659608 | Line feed circuit with logic level controlled ringing | — | 1997-08-19 |