Granted Patent
Utility
US 5,426,450 · App. 08/318,031
Hands-free hardware keyboard
Inventor:
Donald E. Drumm
Patented Case
View Patent ↗
Granted: Jun 20, 1995
Filed: Oct 4, 1994
Inventor
Donald E. Drumm
Assignee (at issue)
Wang Laboratories, 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.