Granted Patent
Utility
US 4,719,943 · App. 06/934,758
Control valve assembly
Inventor:
Asi Perach
Patented Case
View Patent ↗
Granted: Jan 19, 1988
Filed: Nov 25, 1986
Inventor
Asi Perach
Assignee (at issue)
UNITED TECHNOLOGIES CORPORATION
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.