Granted Patent
Utility
US 4,619,286 · App. 06/609,808
Elevation responsive automatic vehicle control system
Inventor:
Roland B. Caldwell
Patented Case
View Patent ↗
Granted: Oct 28, 1986
Filed: May 14, 1984
Inventor
Roland B. Caldwell
Assignee (at issue)
RANCO CO., Ltd.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.