Granted Patent
Utility
US 5,438,177 · App. 07/879,666
Two-layer membrane switch
Inventor:
Mark Fagan
Patented Case
View Patent ↗
Granted: Aug 1, 1995
Filed: May 6, 1992
Inventor
Mark Fagan
Assignee (at issue)
Key Tronic Corporation
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.