Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4714483 | Air dryer purge control for turbocharged compressors | James P. Koening, David John Knight, James E. Szudy, William Wurst | 1987-12-22 |
| 4691968 | Dual circuit brake valve | James G. Pugh, Duane R. Johnson | 1987-09-08 |
| 4660894 | Proportioning brake valve with dual area secondary piston | Milan J. Sebo | 1987-04-28 |
| 4646840 | Flotation riser | Ronald G. Pettus, Emanuel Schnitzer, Edmund A. Fisher | 1987-03-03 |
| 4605262 | Three way check valve | — | 1986-08-12 |
| 4550953 | Electro-pneumatic control for a vehicle fluid pressure braking system | — | 1985-11-05 |
| 4368926 | Brake proportioning system | — | 1983-01-18 |