Granted Patent
Utility
US 5,792,952 · App. 08/652,868
Fluid thermal mass flow sensor
Inventor:
Thomas R. Ritchart
Patented Case
View Patent ↗
Granted: Aug 11, 1998
Filed: May 23, 1996
Inventor
Thomas R. Ritchart
Assignee (at issue)
Varian, Inc.
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.