Granted Patent
Utility
US 6,188,832 · App. 09/171,849
Method and apparatus for modifications made to a video signal to inhibit the making of acceptable videotape recordings
Inventor:
John O. Ryan
Patented Case
View Patent ↗
Granted: Feb 13, 2001
Filed: Oct 23, 1998
Inventor
John O. Ryan
Assignee (at issue)
MICROVISION, 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.