P
PatentIndex
Search
Landscape
Sign in
Inventor
MORTONSON ROBERT M
2 patents
Patents
2 patents
US4132272A
Jan 2, 1979
Tractor hitch position control system
INT HARVESTER CO
90 citations
91
US4132273A
Jan 2, 1979
Tractor hitch control system having safety features
INT HARVESTER CO
35 citations
87