Granted Patent
Utility
US 4,690,245 · App. 06/931,903
Flattened venturi, method and apparatus for making
Inventors:
Edward E. Gregorich, Timothy R. Maher
Patented Case
View Patent ↗
Granted: Sep 1, 1987
Filed: Nov 14, 1986
Inventors
Edward E. Gregorich
Timothy R. Maher
Assignee (at issue)
STEMCO CO., LTD.
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.