Granted Patent
Utility
US 4,896,095 · App. 07/119,373
Apparatus and method for determining frequency response of a system under test
Inventor:
Johann Schutz
Patented Case
View Patent ↗
Granted: Jan 23, 1990
Filed: Nov 12, 1987
Inventor
Johann Schutz
Assignee (at issue)
Schlumberger Messgerate GmbH
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.