Granted Patent
Utility
US 4,274,752 · App. 06/025,825
Keyboard multiple switch assembly
Inventors:
Daniel L. Huber, Thomas M. Paulson, James M. Williams
Patented Case
View Patent ↗
Granted: Jun 23, 1981
Filed: Apr 2, 1979
Inventors
Daniel L. Huber
Thomas M. Paulson
James M. Williams
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.