Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4923556 | Laminating device for manufacturing identification cards | Johannes Kettelhoit, Erhard Schroder | 1990-05-08 |
| 4790901 | Laminating device for manufacturing identification cards | Johannes Kettelhoit, Erhard Schroder | 1988-12-13 |