Granted Patent
Utility
US 4,628,349 · App. 06/721,721
Video-index signal mixer
Inventor:
Richard W. Midland
Patented Case
View Patent ↗
Granted: Dec 9, 1986
Filed: Apr 9, 1985
Inventor
Richard W. Midland
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.