Granted Patent
Utility
US 4,667,304 · App. 06/674,066
Real-time, localized enhancement of a video image using separable two-dimensional filters
Inventors:
Richard G. Hier, Gregory W. Schmidt
Patented Case
View Patent ↗
Granted: May 19, 1987
Filed: Nov 23, 1984
Inventors
Richard G. Hier
Gregory W. Schmidt
Assignee (at issue)
DigiVision, 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.