Issued Patents All Time
Showing 26–38 of 38 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7170283 | Device for detecting a position of a magnetic pole | Naoto Sonoda | 2007-01-30 |
| 7071651 | Position-of-magnetic-pole detecting device and method | Naoto Sonoda | 2006-07-04 |
| 6903527 | Servo controller | Kazuomi Maeda | 2005-06-07 |
| 6859007 | Servo motor drive control device | Naoto Sonoda | 2005-02-22 |
| 6823235 | Controller for machining gears | Naoto Sonoda | 2004-11-23 |
| 6534944 | Servo controller | Naoto Sonoda | 2003-03-18 |
| 6445154 | Method for detecting synchronous motor rotor magnetic pole position | Naoto Sonoda | 2002-09-03 |
| 5963007 | Current control method for an AC servomotor | Naoto Sonoda | 1999-10-05 |
| 5646495 | Tandem control method based on a digital servomechanism | Kazuomi Maeda, Naoto Sonoda | 1997-07-08 |
| 5572018 | Method and apparatus to detect absolute position using encoder having a counter clear signal | Mitsuyuki Taniguchi, Hiroshi Yamaguchi, Shunsuke Matsubara | 1996-11-05 |
| 4794628 | Counter circuit with mislatching prevention | Keiji Sakamoto | 1988-12-27 |
| 4623831 | Rotor position sensing apparatus for motors | Keiji Sakamoto | 1986-11-18 |
| 4521724 | Apparatus for processing energy regenerated by an AC motor | Keiji Sakamoto | 1985-06-04 |