Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5667303 | Time-temperature integrating indicator device | Russell D. Birkholz, Dee Lynn Johnson, Theodore P. Labuza, Curtis L. Larson, David J. Yarusso | 1997-09-16 |
| 5389426 | Article for use in forming a permanent image using a temporary marker | James M. Ripka | 1995-02-14 |
| 5354598 | Article capable of displaying defined images | — | 1994-10-11 |
| 4877253 | Reusable bingo card | — | 1989-10-31 |
| 4729687 | Imaging device | — | 1988-03-08 |
| 4428321 | Thermally-activated time-temperature indicator | — | 1984-01-31 |
| 4374889 | Oil-repellent microvoid-imaging material | — | 1983-02-22 |
| 4299880 | Demand and timed renewing imaging media | — | 1981-11-10 |