Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11149468 | Electronic key | — | 2021-10-19 |
| 8594597 | Portable transmitter powered by button battery | Toshiaki Saito, Mitsuru Nakagawa | 2013-11-26 |
| 8534104 | Portable wireless key | Mitsuru Nakagawa | 2013-09-17 |
| 8294053 | Electronic key | Mitsuru Nakagawa | 2012-10-23 |
| 8072766 | Portable device for transmitting signal | Mitsuru Nakagawa | 2011-12-06 |
| 7513134 | Case for remote control key | Masashi Hashimoto, Mitsuru Nakagawa | 2009-04-07 |
| 7448238 | Portable device for electronic key system | Mitsuru Nakagawa | 2008-11-11 |
| 7310980 | Case for remote control key | Masashi Hashimoto, Mitsuru Nakagawa | 2007-12-25 |
| 7079587 | Signal transmitter having voltage booster circuit and method of operating the same | Hiroyuki Kitagawa | 2006-07-18 |
| 7050292 | Case for portable equipment | Mitsuru Nakagawa | 2006-05-23 |
| 6839034 | Protective cushion for portable unit with built-in antenna | — | 2005-01-04 |