Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4808509 | Diffusion transfer imaging method and receptor sheet for making personal identification documents | Willy P. De Smedt, Leon L. Vermeulen | 1989-02-28 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4808509 | Diffusion transfer imaging method and receptor sheet for making personal identification documents | Willy P. De Smedt, Leon L. Vermeulen | 1989-02-28 |