Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5109696 | Powertrain performance assessment system | Irving Bright, Ronald C. Erickson, Dennis K. Greene, Robert Hefner, Lowell E. Johnson +2 more | 1992-05-05 |
| 5040119 | Draft control apparatus and method | John P. Hoffman, Larry E. Kendrick, Stephen W. Rector | 1991-08-13 |
| 4852657 | Apparatus for selectively positioning movable work element with preselected maximum velocity control | John P. Hoffman, Larry E. Kendrick | 1989-08-01 |