Granted Patent
Utility
US 5,254,989 · App. 07/728,050
Garbling the identification of a key of a non-coded keyboard, and circuit for performing the method
Inventors:
Philippe Verrier, Roger Poulenard, Hartmut Fink
Patented Case
View Patent ↗
Granted: Oct 19, 1993
Filed: Jul 8, 1991
Inventors
Philippe Verrier
Roger Poulenard
Hartmut Fink
Assignee (at issue)
Bull S.A.
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.