Granted Patent
Utility
US 5,113,789 · App. 07/513,807
Self cleaning flow control orifice
Inventor:
George D. Kamian
Patented Case
View Patent ↗
Granted: May 19, 1992
Filed: Apr 24, 1990
Inventor
George D. Kamian
Assignee (at issue)
Watkins-Johnson Company, 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.