Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887831 | Convertible hitch for mobile equipment | — | 1989-12-19 |
| 4884852 | Double V-shaped endless track drive system | Daniel R. Harper, Quinton B. McNew | 1989-12-05 |
| 4876722 | Active noise control | Nicolaas M. J. Dekker, Adrian W. James | 1989-10-24 |
| 4861120 | Modular endless track drive system and methods of making, installing and repairing same | Daniel R. Harper, Quinton B. McNew | 1989-08-29 |
| 4844560 | Endless drive track joint assembly | Daniel R. Harper, Quinton B. McNew | 1989-07-04 |