Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879496 | Display tube | Alan G. Knapp, Daphne L. Lamport, Derek Washington | 1989-11-07 |
| 4853587 | Flat cathode ray display tube with periodic beam refocusing means | Daphne L. Lamport | 1989-08-01 |