Granted Patent
Utility
US 4,653,508 · App. 06/227,900
Pressure-balanced telemetric pressure sensing system and method therefore
Inventor:
Eric R. Cosman
Patented Case
View Patent ↗
Granted: Mar 31, 1987
Filed: Jan 23, 1981
Inventor
Eric R. Cosman
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.