Granted Patent
Utility
US 6,052,475 · App. 08/906,604
Fingerprint detector using ridge resistance sensing array
Inventor:
Eric L. Upton
Patented Case
View Patent ↗
Granted: Apr 18, 2000
Filed: Aug 4, 1997
Inventor
Eric L. Upton
Assignee (at issue)
TRW Limited
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.