Granted Patent
Utility
US 6,356,705 · App. 08/984,518
Video signal transmission method, superimposed information extraction method, video signal output device, video signal recording device, and video signal recording medium
Inventors:
Akira Ogino, Nozomu Ikeda
Patented Case
View Patent ↗
Granted: Mar 12, 2002
Filed: Dec 3, 1997
Inventors
Akira Ogino
Nozomu Ikeda
Assignee (at issue)
SONY GROUP CORPORATION
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.