Granted Patent
Utility
US 4,521,891 · App. 06/352,894
Multiple channel data communication system
Inventors:
Kenneth Biba, Jose J. Picazo, Jr.
Patented Case
View Patent ↗
Granted: Jun 4, 1985
Filed: Feb 26, 1982
Inventors
Kenneth Biba
Jose J. Picazo, Jr.
Assignee (at issue)
Sytek, 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.