Issued Patents All Time
Showing 26–50 of 60 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7027240 | Digital information recording/reproducing method and apparatus | Hideo Arai, Hitoaki Owashi, Keizo Nishimura, Yoshizumi Watatani, Akira Shibata | 2006-04-11 |
| 7012769 | Digital information recording/reproducing apparatus | Hideo Arai, Hitoaki Owashi, Keizo Nishimura, Yoshizumi Watatani, Akira Shibata | 2006-03-14 |
| 6952315 | Digital information recording/reproducing apparatus | Hideo Arai, Hitoaki Owashi, Keizo Nishimura, Yoshizumi Watatani, Akira Shibata | 2005-10-04 |
| 6847781 | Digital signal recording apparatus and recording medium | Naozumi Sugimura, Seiichi Saitou | 2005-01-25 |
| 6757478 | Method and apparatus for receiving a digital signal and apparatus for recording and reproducing the digital signal | Hitoaki Owashi, Hiroo Okamoto, Takaharu Noguchi | 2004-06-29 |
| 6600870 | Input-output circuit, recording apparatus and reproduction apparatus for digital video signal | Hiroo Okamoto, Hitoaki Owashi, Hiroaki Tachibana, Takaharu Noguchi | 2003-07-29 |
| 6590726 | Apparatus and method for transmitting and receiving digital information | Hideo Arai, Hitoaki Owashi, Keizo Nishimura, Yoshizumi Watatani, Akira Shibata | 2003-07-08 |
| 6498691 | Digital transmission signal processing system and recording/reproducing system | Hideo Arai, Hitoaki Owashi, Keizo Nishimura, Yoshizumi Watatani, Akira Shibata | 2002-12-24 |
| 6430362 | Digital video signal recording/reproducing method and apparatus | Hiroo Okamoto, Nobutaka Amada | 2002-08-06 |
| 6363210 | Communication system for encrypted data and apparatus for selectively recording and reproducing received analog signal and received digital signal | Hitoaki Owashi, Takaharu Noguchi, Hiroo Okamoto, Kazuhiko YOSHIZAWA, Nobutaka Amada +3 more | 2002-03-26 |
| 6324025 | Digital transmission signal processing system and recording/reproducing system | Hideo Arai, Hitoaki Owashi, Keizo Nishimura, Yoshizumi Watatani, Akira Shibata | 2001-11-27 |
| 6321025 | Method and apparatus for receiving and/or reproducing digital signal | Hitoaki Owashi, Hiroo Okamoto, Takaharu Noguchi | 2001-11-20 |
| 6278564 | Digital transmission signal processing system and recording/reproducing system | Hideo Arai, Hitoaki Owashi, Keizo Nishimura, Yoshizumi Watatani, Akira Shibata | 2001-08-21 |
| 6249532 | Interactive chargeable communication system with billing system therefor | Kazuhiko Yoshikawa, Hitoaki Owashi, Hiroyuki Hayakawa, Tadasu Otsubo | 2001-06-19 |
| 6201654 | Method and apparatus for recording digital signal | Hiroo Okamoto, Hitoaki Owashi, Takaharu Noguchi | 2001-03-13 |
| 6163644 | Method and apparatus for receiving and/or reproducing digital signal | Hitoaki Owashi, Hiroo Okamoto, Takaharu Noguchi | 2000-12-19 |
| 6069757 | Digital transmission signal processing system and recording/reproducing system | Hideo Arai, Hitoaki Owashi, Keizo Nishimura, Yoshizumi Watatani, Akira Shibata | 2000-05-30 |
| 6046872 | Method and apparatus for recording digital signal | Hiroo Okamoto, Hitoaki Owashi, Takaharu Noguchi | 2000-04-04 |
| 6041161 | Input-output circuit, recording apparatus and reproduction apparatus for digital video signal | Hiroo Okamoto, Hitoaki Owashi, Hiroaki Tachibana, Takaharu Noguchi | 2000-03-21 |
| 6002694 | Interactive chargeable communication system with billing system therefor | Kazuhiko YOSHIZAWA, Hitoaki Owashi, Hiroyuki Hayakawa, Tadasu Otsubo | 1999-12-14 |
| 6002536 | Digital transmission signal processing system and recording/reproducing system | Hideo Arai, Hitoaki Owashi, Keizo Nishimura, Yoshizumi Watatani, Akira Shibata | 1999-12-14 |
| 5903704 | Apparatus for selectively recording and reproducing received analog and digital signals | Hitoaki Owashi, Takaharu Noguchi, Hiroo Okamoto, Kazuhiko YOSHIZAWA, Nobutaka Amada +3 more | 1999-05-11 |
| 5878010 | Method and apparatus for recording digital signal | Hiroo Okamoto, Hitoaki Owashi, Takaharu Noguchi | 1999-03-02 |
| 5875279 | Subscriber terminal of an interactive communication system and control device thereof | Hitoaki Owashi, Hideo Nishijima, Hiroaki Ono, Takaharu Noguchi, Hiroo Okamoto +2 more | 1999-02-23 |
| 5862004 | Digital transmission signal processing system and recording/reproducing system | Hideo Arai, Hitoaki Owashi, Keizo Nishimura, Yoshizumi Watatani, Akira Shibata | 1999-01-19 |