Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5029198 | Telephone call responding system and control method and device therefor | Geary A. Walpole, Robert Choi, C. Kwai Kong | 1991-07-02 |
| 4829492 | Depthfinder with color LCD display | Oong Choi, Robert Choi | 1989-05-09 |