Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4890257 | Multiple window display system having indirectly addressable windows arranged in an ordered list | John A. Herrod, George M. Trees | 1989-12-26 |
| 4845644 | Data display system | John A. Herrod, Martin W. Ricketts | 1989-07-04 |