Granted Patent
Utility
US 5,796,858 · App. 08/646,531
Fingerprint sensing system using a sheet prism
Inventors:
Gan Zhou, Yong Qiao, Fai Mok
Patented Case
View Patent ↗
Granted: Aug 18, 1998
Filed: May 10, 1996
Inventors
Gan Zhou
Yong Qiao
Fai Mok
Assignee (at issue)
DIGITALPERSONA, 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.