Granted Patent
Utility
US 6,509,818 · App. 09/827,502
Smart overlay for electrical switching
Inventor:
Anthony J. Van Zeeland
Patented Case
View Patent ↗
Granted: Jan 21, 2003
Filed: Apr 6, 2001
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.