Granted Patent
Utility
US 4,885,794 · App. 07/041,818
Method and apparatus for protection of channel access in broadband cable communications systems
Inventor:
Gary J. Sgrignoli
Patented Case
View Patent ↗
Granted: Dec 5, 1989
Filed: Apr 23, 1987
Inventor
Gary J. Sgrignoli
Assignee (at issue)
Zenith Electronics LLC
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.