Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880766 | Record material | Robert E. Miller, Steven L. Vervacke, Timothy J. Bahowick | 1989-11-14 |
| 4870047 | Thermally-responsive record material | Gerald C. Bartman | 1989-09-26 |
| 4837210 | Fluoran derivatives and their use in recording materials | Patricia Dwyer-Hallquist, William Joshua Becker, Robert E. Miller | 1989-06-06 |
| 4820683 | Thermally-responsive record material | Steven L. Vervacke | 1989-04-11 |