Granted Patent
Utility
US 6,812,621 · App. 10/622,583
Multiplexer for a piezo ceramic identification device
Inventor:
Walter Scott
Patented Case
View Patent ↗
Granted: Nov 2, 2004
Filed: Jul 21, 2003
Inventor
Walter Scott
Assignee (at issue)
Cross Match Technologies, 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.