Granted Patent
Utility
US 6,313,850 · App. 09/431,532
Digital versatile disc playback system with efficient modification of subpicture data
Inventor:
Brian M. Czako
Patented Case
View Patent ↗
Granted: Nov 6, 2001
Filed: Nov 1, 1999
Inventor
Brian M. Czako
Assignee (at issue)
Oak Technology, 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.