Granted Patent
Utility
US 6,710,269 · App. 10/198,452
Foil keyboard with security system
Inventors:
Eckhard Kunigkeit, Thomas Walz
Patented Case
View Patent ↗
Granted: Mar 23, 2004
Filed: Jul 18, 2002
Inventors
Eckhard Kunigkeit
Thomas Walz
Assignee (at issue)
International Business Machines 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.