Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876029 | Substituted and unsubstituted ring-bridged para-oligophenylene UV laser dyes | Hans Gusten, Hans-Joachim Ache, Hermann O. Wirth | 1989-10-24 |
| 4853937 | Laser-active aqueous dispersion of a laser dye | Hans Guesten | 1989-08-01 |