Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6507625 | Digital modulator and digital demodulator | Takanori Iwamatsu | 2003-01-14 |
| 6028902 | Clock phase detecting circuit | Hiroyuki Kiyanagi, Takanori Iwamatsu | 2000-02-22 |
| 5987071 | Digital modulator and digital demodulator | Takanori Iwamatsu | 1999-11-16 |
| 5781076 | Digital quadrature amplitude modulators | Takanori Iwamatsu | 1998-07-14 |
| 5659609 | Echo canceller and waveform-distortion compensation device | Nobukazu Koizumi, Yutaka Awata | 1997-08-19 |
| 5638409 | Data receiving device for reproducing a received symbol from a received data signal | Yutaka Awata, Nobukazu Koizumi, Yasuo Ohtomo | 1997-06-10 |
| 5617450 | Digital subscriber loop interface unit | Yutaka Awata, Nobukazu Koizumi | 1997-04-01 |
| 5615235 | Signal processing system for use in a digital signal clock changing apparatus | Tsuyoshi Ueshima | 1997-03-25 |
| 5610943 | Signal processing apparatus | Tsuyoshi Ueshima | 1997-03-11 |
| 5481564 | Received data adjusting device | Yutaka Awata, Norio Ueno, Seiji Miyoshi, Norio Murakami, Atsushi Manabe | 1996-01-02 |
| 5471507 | Circuit for detecting object signal from input signal | Yutaka Awata | 1995-11-28 |
| 5450452 | Digital loop filter and digital PLL circuit using the same | Yutaka Awata | 1995-09-12 |
| 5399985 | Digital PLL circuit | Yutaka Awata, Nobukazu Koizumi, Yasuo Ohtomo | 1995-03-21 |
| 5375147 | Jitter compensating device | Yutaka Awata, Nobukazu Koizumi | 1994-12-20 |
| 5367540 | Transversal filter for use in a digital subscriber line transmission interface | Seiji Mikyoshi, Hiroaki Itokawa, Nobukazu Koizumi, Yutaka Awata, Yuko Kurosaki | 1994-11-22 |
| 5287406 | Hybrid circuit having a two-wire/four-wire converting function | — | 1994-02-15 |
| 5249145 | Transforming adaptors for wave digital filter and balancing network using same | — | 1993-09-28 |
| 5151937 | Adaptive echo canceller | Kaoru Chujo, Hirokazu Fukui | 1992-09-29 |
| 4468749 | Adjustable attenuator circuit | Seiji Kato, Norio Ueno | 1984-08-28 |
| 4333064 | Switched-capacitor filter | Seiji Kato, Norio Ueno, Akihiko Ito, Atsushi Iwata | 1982-06-01 |