Issued Patents 2005
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6853471 | Photochromic synthetic resin object with permanently increased contrast | Hans-Peter Sommer, Gerd-Peter Scherg, Manfred Melzig | 2005-02-08 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6853471 | Photochromic synthetic resin object with permanently increased contrast | Hans-Peter Sommer, Gerd-Peter Scherg, Manfred Melzig | 2005-02-08 |