Granted Patent
Utility
US 4,649,756 · App. 06/749,267
Flow sensors
Inventor:
Murray F. Feller
Patented Case
View Patent ↗
Granted: Mar 17, 1987
Filed: Jun 27, 1985
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.