Granted Patent
Utility
US 5,173,812 · App. 07/688,633
Videorecorder for adding data signals on previously recorded signals, having playback signal phase comparator means
Inventor:
Gerd Reime
Patented Case
View Patent ↗
Granted: Dec 22, 1992
Filed: Apr 19, 1991
Inventor
Gerd Reime
Assignee (at issue)
Nokia (Deutschland) GmbH
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.