Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5034680 | Digital level display device | Hiroshi Iizuka | 1991-07-23 |
| 4931724 | Digital level indicating device | Hiroshi Iizuka | 1990-06-05 |
| 4870349 | Digital level indicating device | Hiroshi Iizuka | 1989-09-26 |
| 4855741 | Logarithmic digital level display device | Hiroshi Iizuka | 1989-08-08 |
| 4805050 | Disk player information selecting apparatus | Yoshio Aoyagi, Tsuneo Ishii, Naoto Arifuku | 1989-02-14 |