Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D462386 | Ball-point pen | Masayuki Tsuchida, Nana Matsumoto | 2002-09-03 |
| D458305 | Ball-point pen | Masayuki Tsuchida, Nana Matsumoto | 2002-06-04 |
| D426573 | Ball-point pen | Nobuo Sekine, Mikiya Ido | 2000-06-13 |
| D426263 | Ball-point pen | Nobuo Sekine, Mikiya Ido | 2000-06-06 |
| 4356551 | Knock detecting method | Hisasi Kawai, Kunimasa Yoshimura, Toshimitsu Ito, Yoshiyasu Ito | 1982-10-26 |
| 4271469 | Method for detecting knocking in internal combustion engine | Hisasi Kawai, Toshimitsu Ito, Masakatsu Sanada | 1981-06-02 |
| 4233944 | Method for controlling ignition timing of internal combustion engine | Norio Omori, Hideya Fujisawa, Yutaka Kawashima, Hisasi Kawai, Masakazu Ninomiya | 1980-11-18 |