Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6628893 | DC motor rotation control apparatus | Ikuya Tsurukawa, Kenji Koyama | 2003-09-30 |
| 6617816 | DC motor rotation detecting apparatus and DC motor rotation control apparatus | Ikuya Tsurukawa, Kenji Koyama | 2003-09-09 |
| 6570350 | DC motor rotation detecting apparatus and DC motor rotation control apparatus | Kenji Koyama, Ikuya Tsurukawa | 2003-05-27 |