Granted Patent
Utility
US 4,264,225 · App. 05/753,326
Bounce dampening system for switch actuators
Inventors:
John N. Cassell, John Anthony ELDER, Benjamin G. Pastrick, William Joseph Thornhill
Patented Case
View Patent ↗
Granted: Apr 28, 1981
Filed: Dec 22, 1976
Inventors
John N. Cassell
John Anthony ELDER
Benjamin G. Pastrick
William Joseph Thornhill
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.