Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4609956 | Magnetic drum cassette with magnetic drum having voice information recorded thereon | Michihiro Torii, Kaoru Endo, Norifumi Ito | 1986-09-02 |
| 4376961 | Magnetic drum/head system for selectively generating recorded voice information | Michihiro Torii, Kouichirou Suzuki, Tadashi Yoshino, Norifumi Itoh, Tetsuya Suzuki | 1983-03-15 |