Granted Patent
Utility
US 4,384,490 · App. 06/256,870
Pressure gauge construction
Inventor:
Robert D. Bissell
Patented Case
View Patent ↗
Granted: May 24, 1983
Filed: Apr 24, 1981
Inventor
Robert D. Bissell
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.