Granted Patent
Utility
US 6,773,128 · App. 09/755,775
Low power, low cost illuminated keyboards and keypads
Inventors:
Andrew Katrinecz, David Byrd
Patented Case
View Patent ↗
Granted: Aug 10, 2004
Filed: Jan 4, 2001
Inventors
Andrew Katrinecz
David Byrd
Assignee (at issue)
Twenty-First Century Technology, 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.