Inventor
HEDBLOM THOMAS P
US28 patents
⚠️ This page may combine multiple inventors who share the name “HEDBLOM THOMAS P”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MINNESOTA MINING & MFG
14 patentsUS5928761AJul 27, 1999
Retroreflective black pavement marking articles
MINNESOTA MINING & MFG96 citations98
US5777791AJul 7, 1998
Wet retroreflective pavement marking articles
MINNESOTA MINING & MFG85 citations96
US5417515AMay 23, 1995
Retroreflective article with dual reflector
MINNESOTA MINING & MFG70 citations96
US5286682AFeb 15, 1994
Yellow retroreflective pavement markings
MINNESOTA MINING & MFG79 citations96
US5227221AJul 13, 1993
Patterned skid preventative sheet
MINNESOTA MINING & MFG100 citations96
US4988541AJan 29, 1991
Process for making retroreflector sheet
MINNESOTA MINING & MFG91 citations96
US4988555AJan 29, 1991
Patterned pavement marking
MINNESOTA MINING & MFG98 citations96
US5774265AJun 30, 1998
Durable retroreflective elements
MINNESOTA MINING & MFG87 citations95
US5763000AJun 9, 1998
Pavement marking with multiple topcoats
MINNESOTA MINING & MFG20 citations92
US5676488AOct 14, 1997
Pavement marking with multiple topcoats
MINNESOTA MINING & MFG38 citations92
US5571362ANov 5, 1996
Method for making retroreflective article with dual reflectors
MINNESOTA MINING & MFG27 citations92
US5683746ANov 4, 1997
Patterned pavement markings with upright retroreflectors
MINNESOTA MINING & MFG24 citations91
US5670227ASep 23, 1997
Patterned pavement markings with upright retroreflectors
MINNESOTA MINING & MFG30 citations91
US5593246AJan 14, 1997
Patterned chalk-resistant pavement marking and method of making
MINNESOTA MINING & MFG44 citations91
3M INNOVATIVE PROPERTIES CO
11 patentsUS6479132B2Nov 12, 2002
Pavement marking articles having enhanced retroreflectivity under dry or wet conditions and method for making same
3M INNOVATIVE PROPERTIES CO53 citations94
US6365262B1Apr 2, 2002
Pavement marking articles having enhanced retroreflectivity under dry or wet conditions and method for making same
3M INNOVATIVE PROPERTIES CO65 citations94
US6247818B1Jun 19, 2001
Method for making retroreflective elements having enhanced retroreflectivity under dry and/or wet conditions
3M INNOVATIVE PROPERTIES CO47 citations92
US7168815B2Jan 30, 2007
Retroreflective elements and articles
3M INNOVATIVE PROPERTIES CO26 citations91
US7156528B2Jan 2, 2007
Retroreflective elements and articles
3M INNOVATIVE PROPERTIES CO27 citations91
US6431788B1Aug 13, 2002
Wear resistant pavement marking
3M INNOVATIVE PROPERTIES CO21 citations88
US6966660B1Nov 22, 2005
Article exhibiting dry and wet retroreflectivity
3M INNOVATIVE PROPERTIES CO15 citations83
US11124933B2Sep 21, 2021
Pavement marking system for lane identification
3M INNOVATIVE PROPERTIES CO0 citations62
US7458693B2Dec 2, 2008
Retroreflective elements and articles
3M INNOVATIVE PROPERTIES CO3 citations61
US7413316B2Aug 19, 2008
Retroreflective elements and articles
3M INNOVATIVE PROPERTIES CO1 citations61
US10344133B2Jul 9, 2019
Pavement marking tape with modified polyurethane topcoat
3M INNOVATIVE PROPERTIES CO0 citations52