Issued Patents All Time
Showing 26–37 of 37 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5644618 | Method of self-diagnosing a mobile telephone set for use in a mobile telephone switching system and a mobile telephone set to which the method is applied | — | 1997-07-01 |
| 5640685 | Mobile telephone device wherein an adder supplies a sum of audio and out-of audio band signals to a compressor circuit | — | 1997-06-17 |
| 5604799 | Switching type echo canceler | Yoshiaki Hosoi | 1997-02-18 |
| 5430796 | Auxiliary attenuator arrangement for use in voice-switched speakerphone and method of selectively inserting communication loss in speakerphone paths | Ikio Yoshida | 1995-07-04 |
| 5423079 | Mobile communication terminal device and method of preventing incorrect information rewriting | Hideo Namiki | 1995-06-06 |
| 5398332 | System for detecting the malfunction of a CPU including a watchdog timer circuit and a memory for storing a malfunction count | Masahiro Ishigami | 1995-03-14 |
| 5332950 | Driver circuit for long luminescence life display device and method of driving such device | Minoru Katsumata | 1994-07-26 |
| 5323457 | Circuit for suppressing white noise in received voice | Tatsuji Ehara, Akimasa Matsushita | 1994-06-21 |
| 5212810 | Terminal equipment of a vehicle radio telephone system | Koji Maeda, Yutaka Tomiyori, Shinji Kawamura, Shinobu Okuno, Hiroshi Takizawa | 1993-05-18 |
| 5179723 | Mobile telephone device for carrying out an aging operation without interference with a mobile telephone system | — | 1993-01-12 |
| 5101178 | Crystal oscillator having frequency adjustment responsive to power supply voltage | — | 1992-03-31 |
| 4982443 | Instantaneous voltage drop detector for DC power source | — | 1991-01-01 |