Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851949 | Brush bounce detection in active shaft ground system | Robert Osborne, Michael Twerdochlib | 1989-07-25 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851949 | Brush bounce detection in active shaft ground system | Robert Osborne, Michael Twerdochlib | 1989-07-25 |