Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839834 | Speed detecting apparatus | Toshihiko Matsuda, Youjirou Miyahara, Kenzo Kamiyama | 1989-06-13 |
| 4814678 | Speed control apparatus for motor | Toshihiko Matsuda, Takashi Sukegawa, Masahiro Tobise | 1989-03-21 |