Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5809131 | Ringer circuit for generating sine wave | Kazuhiro Umeda | 1998-09-15 |
| 5796279 | DC application circuit with suppressed DC magnetization | Kazuhiro Umeda | 1998-08-18 |
| 5414309 | Circuit for applying direct current to winding | Kazuhiro Umeda | 1995-05-09 |