Granted Patent
Utility
US 5,489,923 · App. 08/154,817
Method and apparatus for calibrating an optical computer input system
Inventors:
Roger N. Marshall, Lane T. Hauck, Leonid Shapiro, Jeffrey W. Busch, Eric S. Stevens
Patented Case
View Patent ↗
Granted: Feb 6, 1996
Filed: Nov 19, 1993
Inventors
Roger N. Marshall
Lane T. Hauck
Leonid Shapiro
Jeffrey W. Busch
Eric S. Stevens
Assignee (at issue)
Proxima 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.