Granted Patent
Utility
US 4,909,536 · App. 07/261,685
Electronic height sensor
Inventor:
James A. Hale
Patented Case
View Patent ↗
Granted: Mar 20, 1990
Filed: Oct 24, 1988
Inventor
James A. Hale
Assignee (at issue)
Monroe Auto Equipment Company
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.