Granted Patent
Utility
US 5,898,421 · App. 08/643,991
Gyroscopic pointer and method
Inventor:
Thomas J. Quinn
Patented Case
View Patent ↗
Granted: Apr 27, 1999
Filed: May 7, 1996
Inventor
Thomas J. Quinn
Assignee (at issue)
Gyration, 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.