Granted Patent
Utility
US 6,515,992 · App. 09/203,458
Method and apparatus for input of data
Inventors:
David Robert Weston, Andrew James Copper, Andrew Johnson, Anthony Stephen Walton, David Alan Woodfield
Patented Case
View Patent ↗
Granted: Feb 4, 2003
Filed: Dec 2, 1998
Inventors
David Robert Weston
Andrew James Copper
Andrew Johnson
Anthony Stephen Walton
David Alan Woodfield
Assignee (at issue)
Two Way TV Limited
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.