Granted Patent
Utility
US 4,741,017 · App. 06/939,367
Apparatus and method for identifying and analyzing telephone channel units, commands and responses
Inventors:
Gerald J. Parsons, Leo D. Parsons, David Broderick, Ronald M. Zerby
Patented Case
View Patent ↗
Granted: Apr 26, 1988
Filed: Dec 8, 1986
Inventors
Gerald J. Parsons
Leo D. Parsons
David Broderick
Ronald M. Zerby
Assignee (at issue)
Communications Test Design, 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.