Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873453 | DC motor speed controller having protection | James E. Hansen | 1989-10-10 |
| 4851743 | DC motor speed controller having protection | James E. Hansen | 1989-07-25 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873453 | DC motor speed controller having protection | James E. Hansen | 1989-10-10 |
| 4851743 | DC motor speed controller having protection | James E. Hansen | 1989-07-25 |