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PORTALS LTD
GB13 patents
Top patents by PatentIndex Score
US5388862AFeb 14, 1995
Security articles
PORTALS LTD112 citations98
US5093184AMar 3, 1992
Security paper with metallic patterned elongated security element
PORTALS LTD95 citations96
US4183989AJan 15, 1980
Security papers
PORTALS LTD189 citations93
US5678863AOct 21, 1997
High value documents
PORTALS LTD98 citations92
US5928471AJul 27, 1999
Security features for paper
PORTALS LTD63 citations90
US5868902AFeb 9, 1999
Security paper
PORTALS LTD38 citations89
US5631039AMay 20, 1997
Security thread, a film and a method of manufacture of a security thread
PORTALS LTD64 citations89
US5405500AApr 11, 1995
Method for making sheet materials and security paper
PORTALS LTD36 citations89
US4943093AJul 24, 1990
Security paper for bank notes and the like
PORTALS LTD121 citations89
US4462866AJul 31, 1984
Sheet materials
PORTALS LTD81 citations88
US4462867AJul 31, 1984
Paper incorporating a partially embedded strip
PORTALS LTD64 citations85
US4037007AJul 19, 1977
Document authentification paper
PORTALS LTD66 citations85
US6063239AMay 16, 2000
Security paper
PORTALS LTD13 citations70