Granted Patent
Utility
US 5,638,867 · App. 08/569,232
Fluidic oscillator having a wide range of flow rates, and a fluid meter including such an oscillator
Inventor:
Bao Tuan Huang
Patented Case
View Patent ↗
Granted: Jun 17, 1997
Filed: Jan 11, 1996
Inventor
Bao Tuan Huang
Assignee (at issue)
Schlumberger Industires, S.A.
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.