Granted Patent
Utility
US 4,511,969 · App. 06/496,483
Control channel interface circuit
Inventors:
Mark J. Koenig, Kevin J. Oye
Patented Case
View Patent ↗
Granted: Apr 16, 1985
Filed: May 20, 1983
Inventors
Mark J. Koenig
Kevin J. Oye
Assignee (at issue)
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.