Inventor
HAN WENYU
US12 patents
⚠️ This page may combine multiple inventors who share the name “HAN WENYU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
(unassigned)
6 patentsUS6902111B2Jun 7, 2005
Method and apparatus for impeding the counterfeiting of discs
113 citations97
US6193156B1Feb 27, 2001
Method and apparatus for patterning cards, instruments and documents
91 citations97
US6135355AOct 24, 2000
Method and apparatus for impeding the counterfeiting of cards, instruments and documents
42 citations95
US6354506B1Mar 12, 2002
Method and apparatus for impeding the counterfeiting of cards, instruments and documents
20 citations92
US6068301AMay 30, 2000
Method and apparatus for impeding the counterfeiting of cards, instruments and documents
14 citations81
US6616043B2Sep 9, 2003
Multi sensor information reader
10 citations73