Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4827342 | Video signal processing apparatus for removing noise from reproduced signals | Haruo Ohta | 1989-05-02 |
| 4821139 | Method of grounding electrical current surges | — | 1989-04-11 |