Granted Patent
Utility
US 5,332,944 · App. 08/133,653
Environmentally sealed piezoelectric switch assembly
Inventor:
David J. Cline
Patented Case
View Patent ↗
Granted: Jul 26, 1994
Filed: Oct 6, 1993
Inventor
David J. Cline
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.