Granted Patent
Utility
US 5,987,187 · App. 08/926,894
Detecting slant scratches in images of a video signal
Inventor:
Gerhard Wischermann
Patented Case
View Patent ↗
Granted: Nov 16, 1999
Filed: Sep 10, 1997
Inventor
Gerhard Wischermann
Assignee (at issue)
U.S. Philips 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.