Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D310076 | Telephone | Shigeaki Kido, Sadao Isozaki | 1990-08-21 |
| D304564 | Attendant telephone switchboard | Shigeaki Kido, Sadao Isozaki | 1989-11-14 |
| D303801 | Direct station telephone selector | Shigeaki Kido, Sadao Isozaki | 1989-10-03 |
| D300029 | Direct station telephone selector stand | Shigeaki Kido, Sadao Isozaki | 1989-02-28 |
| D299134 | Telephone apparatus with speakerphone and display panel | Shigeaki Kido, Sadao Isozaki | 1988-12-27 |