Granted Patent
Utility
US 5,080,133 · App. 07/683,147
Control valve assembly
Inventors:
Duane R. Johnson, Robert J. Herbst
Patented Case
View Patent ↗
Granted: Jan 14, 1992
Filed: Apr 10, 1991
Inventors
Duane R. Johnson
Robert J. Herbst
Assignee (at issue)
AlliedSignal, 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.