Inventor
WITTREN RICHARD A
US8 patents
Patents
8 patentsUS4556078ADec 3, 1985
Priority valve
DEERE & CO31 citations91
US4541451ASep 17, 1985
Priority valve
DEERE & CO21 citations81
US4640094AFeb 3, 1987
Flow amplifying steering system
DEERE & CO16 citations72
US4463775AAug 7, 1984
Compensating valve
DEERE & CO12 citations72
US4405030ASep 20, 1983
Steering system and compensating valve
DEERE & CO14 citations72
US4367803AJan 11, 1983
Steering system
DEERE & CO14 citations72
US4170113AOct 9, 1979
Hydraulic system with unloading valve assembly
DEERE & CO11 citations72
US4209984AJul 1, 1980
Hydraulic system with unloading valve assembly
DEERE & CO5 citations61