Granted Patent
Utility
US 5,104,144 · App. 07/587,981
Shock absorber with sonar position sensor
Inventor:
Michael R. Bethell
Patented Case
View Patent ↗
Granted: Apr 14, 1992
Filed: Sep 25, 1990
Inventor
Michael R. Bethell
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.