Granted Patent
Utility
US 4,739,451 · App. 06/948,280
Modularly expandable desktop keyboard
Inventor:
Lawrence M. Kuba
Patented Case
View Patent ↗
Granted: Apr 19, 1988
Filed: Dec 31, 1986
Inventor
Lawrence M. Kuba
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.