Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4826745 | Method of preparing a hologram | Trevor Groves | 1989-05-02 |
| 4816360 | Multicolor holograms using gelatin as the binder and method for producing the same | James Doyle, John A. Clark | 1989-03-28 |