Granted Patent
Utility
US 4,009,604 · App. 05/602,569
Pressure converter for calibrating gauges
Inventors:
Samuel D. Taber, James H. Coulter
Patented Case
View Patent ↗
Granted: Mar 1, 1977
Filed: Aug 7, 1975
Inventors
Samuel D. Taber
James H. Coulter
Assignee (at issue)
National Controls 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.