Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4834473 | Holographic operator display for control systems | Marion A. Keyes, IV | 1989-05-30 |
| 4816703 | On-line serial communication interface from a current loop to a computer and/or terminal | Edward L. Sterling, Jr. | 1989-03-28 |