Granted Patent
Utility
US 5,150,334 · App. 07/760,619
System and method for ultrasonic measurement of material level
Inventor:
David Crosby
Patented Case
View Patent ↗
Granted: Sep 22, 1992
Filed: Sep 16, 1991
Inventor
David Crosby
Assignee (at issue)
Bindicator 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.