Granted Patent
Utility
US 4,137,933 · App. 05/768,040
Control valve
Inventor:
Jesse L. Culpepper
Patented Case
View Patent ↗
Granted: Feb 6, 1979
Filed: Feb 14, 1977
Inventor
Jesse L. Culpepper
Assignee (at issue)
TRW Limited
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.