Granted Patent
Utility
US 5,345,400 · App. 07/792,370
Method of calibrating mechanical pressure gauges
Inventors:
Ronald D. Bissell, Nicholas E. Ortyl, III
Patented Case
View Patent ↗
Granted: Sep 6, 1994
Filed: Nov 15, 1991
Inventors
Ronald D. Bissell
Nicholas E. Ortyl, III
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.