Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4375289 | Apparatus for monitoring a boundary line | Karl-Heinz Schmall | 1983-03-01 |
| 4215856 | Apparatus and method for controlling game playing time | Karl-Heinz Schmall | 1980-08-05 |