Granted Patent
Utility
US 4,828,027 · App. 07/177,931
Apparatus for monitoring a parameter in a well
Inventor:
Mark A. Schnatzmeyer
Patented Case
View Patent ↗
Granted: May 9, 1989
Filed: Apr 4, 1988
Inventor
Mark A. Schnatzmeyer
Assignee (at issue)
Otis Engineering 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.