Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4326148 | Gas discharge display device | Takio Okamoto, Yoshio Nakagawa, Hidezo Akutsu | 1982-04-20 |
| 4206386 | Gas discharge display device | Hidezo Akutsu, Yoshio Nakagawa, Takio Okamoto | 1980-06-03 |