Granted Patent
Utility
US 5,168,531 · App. 07/722,082
Real-time recognition of pointing information from video
Inventor:
Claude Sigel
Patented Case
View Patent ↗
Granted: Dec 1, 1992
Filed: Jun 27, 1991
Inventor
Claude Sigel
Assignee (at issue)
Digital Equipment 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.