Granted Patent
Utility
US 4,348,122 · App. 06/200,254
Shift lock and position indicating torsion spring activated key switch
Inventors:
Justin O. Balta, Edward I. Nelson
Patented Case
View Patent ↗
Granted: Sep 7, 1982
Filed: Oct 23, 1980
Inventors
Justin O. Balta
Edward I. Nelson
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.