Inventor
HECKENKAMP CHRISTOPH
DE5 patents
⚠️ This page may combine multiple inventors who share the name “HECKENKAMP CHRISTOPH”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
GAO GES AUTOMATION ORG
4 patentsUS6337752B1Jan 8, 2002
Data carrier having an optically variable element and methods for producing it
GAO GES AUTOMATION ORG94 citations97
US6954293B2Oct 11, 2005
Data carrier having an optically variable element and methods for producing it
GAO GES AUTOMATION ORG44 citations95
US5433807AJul 18, 1995
Method of producing a document with an unforgeable surface relief
GAO GES AUTOMATION ORG47 citations95
US4988126AJan 29, 1991
Document with an unforgeable surface
GAO GES AUTOMATION ORG58 citations95