Granted Patent
Utility
US 4,742,531 · App. 06/902,825
Encoding method for T1 line format for CCITT 32k bit per second ADPCM clear channel transmission
Inventors:
Ernest E. Blondeau, Jr., Stephen J. Czarnecki
Patented Case
View Patent ↗
Granted: May 3, 1988
Filed: Sep 2, 1986
Inventors
Ernest E. Blondeau, Jr.
Stephen J. Czarnecki
Assignee (at issue)
GTE Communication Systems 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.