Granted Patent
Utility
US 6,423,001 · App. 09/827,325
Method and apparatus for signal transmission and detection using a contact device
Inventor:
Marcio Marc Abreu
Patented Case
View Patent ↗
Granted: Jul 23, 2002
Filed: Apr 6, 2001
Inventor
Marcio Marc Abreu
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.