Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5311980 | Device and method for displaying advertisements on conveyors | Heinz Schroeder | 1994-05-17 |
| 5209340 | Method and device for displaying advertisements on conveyors | Heinz Schroeder | 1993-05-11 |