Granted Patent
Utility
US 6,728,965 · App. 08/915,467
Channel changer for use in a switched digital video system
Inventor:
Weidong Mao
Patented Case
View Patent ↗
Granted: Apr 27, 2004
Filed: Aug 20, 1997
Inventor
Weidong Mao
Assignee (at issue)
Next Level Communications, 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.