Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8698503 | Geomagnetic application device | Yoshinobu Honkura, Eiji Kako, Ryuji Masaki | 2014-04-15 |
| 7278219 | Magnetic compass | Yoshinobu Honkura, Hitoshi Aoyama, Eiji Kako | 2007-10-09 |