| 5375663 |
Earthmoving apparatus and method for grading land providing continuous resurveying |
— |
1994-12-27 |
| 5334987 |
Agricultural aircraft control system using the global positioning system |
— |
1994-08-02 |
| 5095629 |
Laser beam target |
Daniel R. Klemer, Mark D. Sobottke |
1992-03-17 |
| 4888890 |
Laser control of excavating machine digging depth |
Robert H. Studebaker, Michael H. Kidwell |
1989-12-26 |
| 4836669 |
Apparatus and method for projection of reference planes of light |
— |
1989-06-06 |
| 4830489 |
Three dimensional laser beam survey system |
Gary Cain, DuWain K. Ake |
1989-05-16 |
| 4786178 |
Apparatus and method for detecting the position and orientation of a reference beam of light |
— |
1988-11-22 |
| 4770480 |
Apparatus and method for providing multiple reference laser beams |
— |
1988-09-13 |
| 4767208 |
Self leveling transmitter for laser alignment systems |
Gary Cain, Joseph F. Rando, Lawrence J. Meyers, Theodore J. Markley |
1988-08-30 |
| 4679937 |
Self leveling transmitter for laser alignment systems |
Gary Cain, Lawrence J. Meyers, Joseph F. Rando, Theodore J. Markley |
1987-07-14 |
| 4662707 |
Lighthouse structure and compensating lens in reference laser beam projecting apparatus |
Mark D. Sobottke |
1987-05-05 |
| 4654856 |
Laser beam projection device and arrangement for mounting a laser plasma tube therein |
Theodore J. Markley, Edward E. Hart, William C. Pohl |
1987-03-31 |
| 4629321 |
Grade setting and calibration arrangement for laser beam projection device |
Edward E. Hart |
1986-12-16 |
| 4526201 |
Four-way valve with internal pilot |
Arthur H. Geyler, Jr. |
1985-07-02 |
| 4225226 |
Laser guidance system for crop spraying aircraft |
Richard W. Davidson, Joseph F. Rando |
1980-09-30 |