Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5703936 | Communication apparatus receiving information from portable information medium | Shinji Tsuchida, Michihiro Izumi | 1997-12-30 |
| 5481605 | Private branch exchange capable of analyzing information received from | Shigeki Sakurai | 1996-01-02 |
| 5459778 | Telephone exchange apparatus, and method of connecting calls therein | Yoshihiro Tanigawa | 1995-10-17 |
| 5267307 | Communication apparatus | Michihiro Izumi | 1993-11-30 |
| 5251254 | Control of incoming and outgoing calls in a key system | Yoshihiro Tanigawa, Tsutomu Nishino | 1993-10-05 |
| 5245651 | Communication apparatus for storing abandoned call information | Takuji Nakatsuma | 1993-09-14 |
| 5153908 | Automatic redial in a key telephone system having different line types | Katsuhiro Kakizawa | 1992-10-06 |
| 5138655 | Telephone apparatus capable of setting card unit therein | Kuniaki Ohtsuka, Yoshihiro Tanigawa, Shoji Suzuki, Shunji Arai, Shigeru Hiroki +2 more | 1992-08-11 |