Granted Patent
Utility
US 6,457,371 · App. 09/971,438
Ultrasonic flow sensor with error detection and compensation
Inventor:
Murray F. Feller
Patented Case
View Patent ↗
Granted: Oct 1, 2002
Filed: Oct 5, 2001
Inventor
Murray F. Feller
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.