Granted Patent
Utility
US 4,301,345 · App. 06/124,945
Key switch actuation by torsion spring
Inventor:
Justin O. Balta
Patented Case
View Patent ↗
Granted: Nov 17, 1981
Filed: Feb 26, 1980
Inventor
Justin O. Balta
Assignee (at issue)
Burroughs, 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.