| 8776701 |
Row crop fertilizer applying apparatus |
Lee F. Nikkel |
2014-07-15 |
| 8256526 |
Apparatus and a system for providing guidance control for pull type tongued implements |
Marlin W. Unruh |
2012-09-04 |
| 8109070 |
Dual windrow crop inverting and combining apparatus and method |
Lawrence E. Kuhlmann |
2012-02-07 |
| 7623952 |
GPS controlled guidance system for farm tractor/implement combination |
Marlin W. Unruh |
2009-11-24 |
| 7490678 |
GPS controlled guidance system for farm tractor/implement combination |
Marlin W. Unruh, Lee F. Nikkel, Lawrence E. Kuhlmann, David R. Long |
2009-02-17 |
| 6354429 |
Agricultural crop material windrow inverting method and apparatus |
Lawrence E. Kuhlmann |
2002-03-12 |
| 6279666 |
Row crop debris clearing apparatus |
Lee F. Nikkel |
2001-08-28 |
| 5752453 |
Apparatus for use in applying fertilizer |
Lee F. Nikkel |
1998-05-19 |
| 5732780 |
Implement for making angled water retention depressions and mounds |
Lee F. Nikkel, David R. Long |
1998-03-31 |
| 5582255 |
Guidance system having adjustable width capability |
Lee F. Nikkel |
1996-12-10 |
| 5524525 |
Rotary servo valve and guidance system apparatus for controlling the same |
Lee F. Nikkel, Marlin W. Unruh |
1996-06-11 |
| 5240079 |
Guidance control system for farm tractor/implement combination having improved turnaround capability |
— |
1993-08-31 |
| 5170849 |
Guidance control system for farm tractor/implement combination |
Lee F. Nikkel, Marlin W. Unruh |
1992-12-15 |
| 5156219 |
Positioning apparatus for drawn implement |
Lee F. Nikkel |
1992-10-20 |
| RE34080 |
Row following guidance device for a tractor-drawn row crop implement |
— |
1992-09-29 |
| 5025866 |
Row following drawn implement with internal steering arm |
Lee F. Nikkel |
1991-06-25 |
| 4640365 |
Row following guidance device for a tractor-drawn row crop implement |
— |
1987-02-03 |