Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839335 | Heat sensitive recording element | — | 1989-06-13 |
| 4826976 | Color-shifted dyes with thermally unstable carbamate moiety comprising T-alkoxycarbonyl group | Alan L. Borror, Donald A. McGowan | 1989-05-02 |
| 4818742 | Heat sensitive recording element | — | 1989-04-04 |