Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4794639 | Method and apparatus for automatically transmitting a message to a telephone terminal | Hiroaki Yamashita | 1988-12-27 |
| 4635253 | Exchange system including plural terminals for voice and data transmission | Kiyoshi Ishikawa, Michiaki Okano | 1987-01-06 |
| 4631686 | Semiconductor integrated circuit device | Yasuo Ikawa, Tadashi Shibata, Misao Miyata, Masahiko Kawamura, Noboru Amano | 1986-12-23 |
| 4330886 | Automatic telephone exchange system for both speech signals and data transfer | Takeo Fukuda, Kazuhiko Hanawa | 1982-05-18 |
| 4297532 | Interfacing circuit status detection arrangement in a telephone exchange | Takeo Fukuda, Kazuhiko Hanawa, Michiko Haseyama | 1981-10-27 |
| 4276639 | Telephone exchange with time shared speech paths and selectively attenuated speech signals | Takeo Fukuda, Tadashi Murayama | 1981-06-30 |
| 4215251 | Switching apparatus selectively utilizing a regenerative repeater | Takeo Fukuda, Kazuhiko Hanawa | 1980-07-29 |