Granted Patent
Utility
US 4,314,114 · App. 06/118,410
Laminated membrane switch
Inventor:
Willis A. Larson
Patented Case
View Patent ↗
Granted: Feb 2, 1982
Filed: Feb 4, 1980
Inventor
Willis A. Larson
Assignee (at issue)
Oak Industries 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.