Granted Patent
Utility
US 5,990,772 · App. 09/160,645
Pushbutton switch with magnetically coupled armature
Inventor:
Anthony J. Van Zeeland
Patented Case
View Patent ↗
Granted: Nov 23, 1999
Filed: Sep 25, 1998
Inventor
Anthony J. Van Zeeland
Assignee (at issue)
Duraswitch 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.