Granted Patent
Utility
US 4,246,796 · App. 06/023,551
Pressure gauge construction
Inventor:
Richard H. Wetterhorn
Patented Case
View Patent ↗
Granted: Jan 27, 1981
Filed: Mar 26, 1979
Inventor
Richard H. Wetterhorn
Assignee (at issue)
Dresser Industries, 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.