Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5340689 | Image-recording materials with cyclic 1,3-sulfur-nitrogen dye providing compounds | Efthimios Chinoporos, Robert H. Pauze, David P. Waller | 1994-08-23 |
| 5294375 | Thermochromic materials | Marcis M. Kampe, David P. Waller | 1994-03-15 |