Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4818923 | Method of, and apparatus for, regulating the rotational speed of an electric motor in a four quadrant mode of operation | Johannes Felber | 1989-04-04 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4818923 | Method of, and apparatus for, regulating the rotational speed of an electric motor in a four quadrant mode of operation | Johannes Felber | 1989-04-04 |