Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7729699 | Switching center for mobile handover | Kenichi Sakamoto, Masaru Murakami, Takashi Yokoyama | 2010-06-01 |
| 7079513 | Communication system | Kenichi Sakamoto, Masaru Murakami, Takashi Yokoyama | 2006-07-18 |
| 6795414 | Communication system | Kenichi Sakamoto, Masaru Murakami, Takashi Yokoyama | 2004-09-21 |
| 6754495 | Handover method in mobile communication system | Kenichi Sakamoto, Masaru Murakami, Takashi Yokoyama | 2004-06-22 |
| 6333977 | Communication method authenticating a personal station and calculating a fee of a telephone call from the personal station | Jun Yamada, Fumitaka Itoh, Takeshi Mori | 2001-12-25 |
| 6289008 | Communication system | Kenichi Sakamoto, Masaru Murakami, Takashi Yokoyama | 2001-09-11 |
| 6263204 | Switching center for mobile handover | Kenichi Sakamoto, Masaru Murakami, Takashi Yokoyama | 2001-07-17 |
| 6259920 | Handover method in mobile communication system | Kenichi Sakamoto, Masaru Murakami, Takashi Yokoyama | 2001-07-10 |
| 6178165 | Communication system | Kenichi Sakamoto, Masaru Murakami, Takashi Zokoyama | 2001-01-23 |
| 6108546 | Handover method in mobile communication system | Kenichi Sakamoto, Masaru Murakami, Takashi Yokoyama | 2000-08-22 |
| 6049534 | Communication system | Kenichi Sakamoto, Masaru Murakami, Takashi Yokoyama | 2000-04-11 |
| 5991379 | Radio communication system authenticating a personal station and calculating a fee of a telephone call from the personal station | Jun Yamada, Fumitaka Itoh, Takeshi Mori | 1999-11-23 |
| 5983107 | Mobile radio communications system | Masato Hayashi, Mikiya Namura, Koichi Tanigawa | 1999-11-09 |
| 5749053 | Mobile communication network and control method thereof | Toshiya Ouchi, Shiro Tanabe, Ken Nanjo, Takeshi Maki | 1998-05-05 |
| 5732073 | Slots assignment method for control channel signal in mobile telecommunication system and base station employing the slots assignment method | Yasushi Shiina, Takeshi Maki | 1998-03-24 |