Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5725384 | Questionnaire agency system and method for conducting questionnaire on people who meet conditions | Ryoichi Ishibashi | 1998-03-10 |
| 5663949 | Line protection switching system in duplexed fiber interface shelf | Ryoichi Ishibashi, Kouki Mie, Hiroya Kawasaki | 1997-09-02 |