Issued Patents All Time
Showing 26–41 of 41 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6204807 | Portable GPS positioning apparatus | Kazumi Sakumoto, Keisuke Tsubata | 2001-03-20 |
| 6129676 | Movement rate monitor | Keisuke Tsubata, Chiaki Nakamura, Kazumi Sakumoto, Naokatsu Nosaka, Motomu Hayakawa | 2000-10-10 |
| 6009375 | Portable GPS receiver | Kazumi Sakumoto, Chiaki Nakamura, Keisuke Tsubata | 1999-12-28 |
| 5926131 | GPS receiving apparatus | Kazumi Sakumoto, Chiaki Nakamura, Keisuke Tsubata | 1999-07-20 |
| 5905460 | Wrist watch type GPS receiver | Keisuke Tsubata, Takeshi Oono, Kazumi Sakumoto, Chiaki Nakamura | 1999-05-18 |
| 5776070 | Pulse rate counter utilizing body movement amptitude detection | Kouji Kitazawa, Motomu Hayakawa | 1998-07-07 |
| 5766131 | Pulse-wave measuring apparatus | Yutaka Kondo, Katsuyuki Honda, Takeshi Ono | 1998-06-16 |
| 5759156 | Period and frequency measurement device with correction device and method thereof | Motomu Hayakawa, Tsukasa Kosuda, Chiaki Nakamura | 1998-06-02 |
| 5697374 | Pulse rate monitor | Keisuke Tsubata, Chiaki Nakamura, Kazumi Sakumoto, Naokatsu Nosaka, Motomu Hayakawa | 1997-12-16 |
| 5691556 | Step-up semiconductor integrated circuit and electronic equipment using the semiconductor integrated circuit | Yutaka Saito, Hiroshi Takahashi, Katsuhiro Horiguchi | 1997-11-25 |
| 5190047 | Photoelectric pulsation type pulsimeter | Hiroyuki Masaki, Yuichi Inoue | 1993-03-02 |
| 4779248 | Electronic timepiece | Yuichi Inoue, Hiroyuki Masaki | 1988-10-18 |
| 4760564 | Analog electronic timepiece with charging function | — | 1988-07-26 |
| 4759003 | Electronic analog timepiece with voltage checking function | Yoshihiko Kiyono, Syuji Ohtawa, Hitoshi Ochiai, Yuichi Inoue | 1988-07-19 |
| 4737944 | Electronic timepiece | Yuichi Inoue, Hiroyuki Masaki, Shuji Ohtawa, Masao Kasuga | 1988-04-12 |
| 4690568 | Battery lifetime indicator for a stopwatch | Isamu Nishida | 1987-09-01 |