Granted Patent
Utility
US 4,434,670 · App. 06/299,394
Fluid flow meter
Inventor:
Borje O. Rosaen
Patented Case
View Patent ↗
Granted: Mar 6, 1984
Filed: Sep 4, 1981
Inventor
Borje O. Rosaen
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.