Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7391715 | Transmitter device and transmitting method using OFDM and MC-CDMA | Kyesan Lee, Takeo OHSEKI, Hiroyasu Ishikawa | 2008-06-24 |
| 7349372 | Packet control apparatus to connect interconnected network and wireless apparatus | Naoki Fuke, Keizo Sugiyama | 2008-03-25 |
| 7336742 | Frequency error correction device and OFDM receiver with the device | Takeo OHSEKI, Masato Furudate, Yoshio Kunisawa, Hiroyasu Ishikawa | 2008-02-26 |
| 7283493 | System and method for switching between frequency channels in wireless LAN | Keizo Sugiyama, Naoki Fuke | 2007-10-16 |
| 7216159 | Wireless LAN system for virtual LAN | Kouichi Hirose, Keizou Sugiyama | 2007-05-08 |
| 7123941 | Radio LAN master station system | Tadayuki Fukuhara, Hiroyasu Ishikawa, Takayuki Warabino, Naoki Fuke, Keizo Sugiyama | 2006-10-17 |
| 6785248 | Spread spectrum communication method and spread spectrum communication apparatus | Naoki Fuke, Hiroyasu Ishikawa | 2004-08-31 |
| 6629121 | Surface acoustic wave-matched filter and differential detector for demodulating spread spectrum signals | Hiroyasu Ishikawa | 2003-09-30 |
| 6166687 | Method for determining position of mobile earth station in satellite communication system | Hiroyasu Ishikawa, Hideo Kobayashi | 2000-12-26 |
| 6154506 | Timing recovery and tracking method and apparatus for data signals | Hiroyasu Ishikawa, Hideo Kobayashi | 2000-11-28 |
| 6104746 | Spread spectrum communication system | Hiroyasu Ishikawa, Hideo Kobayashi | 2000-08-15 |
| 5974082 | Spread spectrum communications system | Hiroyasu Ishikawa, Hideo Kobayashi | 1999-10-26 |
| 5969669 | Method for determining position of mobile earth station in satellite communication system | Hiroyasu Ishikawa, Hideo Kobayashi | 1999-10-19 |
| 5548801 | System for determining and registering location of mobile terminal for communication system with non-geosynchronous satellites | Noriyuki Araki, Yasuhiko Itoh | 1996-08-20 |
| 5543813 | System for determining and registering location of mobile terminal for communication system with non-geosynchronous satellites | Noriyuki Araki, Yasuhiko Itoh | 1996-08-06 |
| 5408490 | Gas laser device | Kiyohisa Terai, Takaaki Murata, Tohru Tamagawa, Hirokatsu Suzuki | 1995-04-18 |
| 5319672 | Spread spectrum communication system | Munehiko Sumiya | 1994-06-07 |
| 5056055 | Coherent surface acoustic wave unique word detector | — | 1991-10-08 |
| 5016206 | Unique word detection system | — | 1991-05-14 |
| 4733122 | Acoustic surface wave filter bank | Yasuhiko Ito | 1988-03-22 |
| 4706239 | Communications satellite repeater | Yasuhiko Ito | 1987-11-10 |