Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8122083 | Client apparatus | Takehiko Hanada, Shin Miura, Shigeru Imai, Shinji Akatsu, Masami Matsubara +1 more | 2012-02-21 |
| 6498833 | Channel check test system | Shigeaki Suzuki, Nobuyoshi Horie | 2002-12-24 |
| 6324260 | Channel check test system | Shigeaki Suzuki, Nobuyoshi Horie | 2001-11-27 |
| 6172978 | Tandem relay device | Wataru Fushimi, Yoshihiko Shirokura, Hideaki Ebisawa, Yushi Naito | 2001-01-09 |
| 6147973 | Signal discrimination apparatus, a method for discriminating a signal, and a signal transmitting apparatus for voiceband signals | Yushi Naito, Hideaki Ebisawa, Nobuyoshi Horie | 2000-11-14 |
| 5694517 | Signal discrimination circuit for determining the type of signal transmitted via a telephone network | Yushi Naito | 1997-12-02 |