Granted Patent
Utility
US 5,115,230 · App. 07/643,156
Light-pen system for projected images
Inventor:
Lanny S. Smoot
Patented Case
View Patent ↗
Granted: May 19, 1992
Filed: Jan 18, 1991
Inventor
Lanny S. Smoot
Assignee (at issue)
Bell Communications Research, 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.