Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4634387 | Device for simulating the movements of and representing rotation symmetrical bodies | — | 1987-01-06 |
| 4466717 | Optical system for lantern slide projection | Ludwig Meier, Klaus-Dieter Scharf | 1984-08-21 |
| 4311468 | Planet projection | Hans-Jurgen Kiel | 1982-01-19 |
| 4214297 | Arrangement for spectral dispersion of a bundle of light | Ludwig Meier | 1980-07-22 |