P

Inventor

FOSSUM DOUGLAS K

US5 patents
⚠️ This page may combine multiple inventors who share the name “FOSSUM DOUGLAS K”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

MINNESOTA MINING & MFG

4 patents
US5683774ANov 4, 1997

Durable, tamper resistant security laminate

MINNESOTA MINING & MFG144 citations97
US5169707ADec 8, 1992

Retroreflective security laminates with dual level verification

MINNESOTA MINING & MFG178 citations97
US5060981AOct 29, 1991

Transparent overlay for protecting a document from tampering

MINNESOTA MINING & MFG61 citations93
US4968063ANov 6, 1990

Transparent tamper-indicating document overlay

MINNESOTA MINING & MFG79 citations93

3M INNOVATIVE PROPERTIES CO

1 patent
US6284337B1Sep 4, 2001

Durable security laminate with heat-shrinkable layer

3M INNOVATIVE PROPERTIES CO72 citations93