Granted Patent
Utility
US 4,879,507 · App. 07/289,288
Noise measurement probe
Inventor:
Douglas C. Smith
Patented Case
View Patent ↗
Granted: Nov 7, 1989
Filed: Dec 23, 1988
Inventor
Douglas C. Smith
Assignees (at issue)
American Telephone and Telegraph, Co.
AT&T Information Systems 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.