Granted Patent
Utility
US 6,724,324 · App. 09/643,236
Capacitive proximity sensor
Inventor:
David K. Lambert
Patented Case
View Patent ↗
Granted: Apr 20, 2004
Filed: Aug 21, 2000
Inventor
David K. Lambert
Assignee (at issue)
Delphi Technologies
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.