Granted Patent
Utility
US 5,969,440 · App. 09/040,468
Push bar with redundant pressure sensors and fail safe mechanical switch
Inventors:
Christopher L. Young, Richard Geringer, David Geringer
Patented Case
View Patent ↗
Granted: Oct 19, 1999
Filed: Mar 18, 1998
Inventors
Christopher L. Young
Richard Geringer
David Geringer
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.