Granted Patent
Utility
US 4,644,800 · App. 06/869,510
Annular venturi flow measuring device
Inventor:
Martin J. Kozlak
Patented Case
View Patent ↗
Granted: Feb 24, 1987
Filed: Jun 2, 1986
Inventor
Martin J. Kozlak
Assignee (at issue)
Combustion Engineering, 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.