Granted Patent
Utility
US 4,331,133 · App. 06/164,136
Pressure measurement apparatus
Inventor:
Edward J. Arkans
Patented Case
View Patent ↗
Granted: May 25, 1982
Filed: Jun 30, 1980
Inventor
Edward J. Arkans
Assignee (at issue)
The Kendall Company LP
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.