Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4728494 | Spectacle frames made of NI alloy | Lorenz Berchtold | 1988-03-01 |
| 4624832 | Eyeglass frames made of Ni alloy | Horst Heidsiek, Horst Dieter Becker | 1986-11-25 |
| 4476090 | Material for jewelry and commodities and process for its production | Horst Heidsiek | 1984-10-09 |