Inventor
MAY DAVID C
US30 patents
⚠️ This page may combine multiple inventors who share the name “MAY DAVID C”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MINNESOTA MINING & MFG
14 patentsUS5677050AOct 14, 1997
Retroreflective sheeting having an abrasion resistant ceramer coating
MINNESOTA MINING & MFG181 citations99
US5417515AMay 23, 1995
Retroreflective article with dual reflector
MINNESOTA MINING & MFG70 citations96
US4875798AOct 24, 1989
Retroreflective pavement marker
MINNESOTA MINING & MFG80 citations96
US5774265AJun 30, 1998
Durable retroreflective elements
MINNESOTA MINING & MFG87 citations95
US5667335ASep 16, 1997
Fiber reinforced raised pavement marker and method of making
MINNESOTA MINING & MFG58 citations95
US5310278AMay 10, 1994
Pavement markers with silicone adhesive
MINNESOTA MINING & MFG44 citations95
US5835271ANov 10, 1998
Encased retroreflective elements and method for making
MINNESOTA MINING & MFG49 citations92
US5571362ANov 5, 1996
Method for making retroreflective article with dual reflectors
MINNESOTA MINING & MFG27 citations92
US5391015AFeb 21, 1995
Pavement markers with silicone adhesive
MINNESOTA MINING & MFG37 citations92
US4648689AMar 10, 1987
Pavement marking tape
MINNESOTA MINING & MFG30 citations92
US4534673AAug 13, 1985
Elastomeric pavement marker
MINNESOTA MINING & MFG38 citations92
US4418110ANov 29, 1983
Vapor-permeable retroreflective sheeting
MINNESOTA MINING & MFG43 citations92
US4521129AJun 4, 1985
Elastomeric pavement marker having improved configuration
MINNESOTA MINING & MFG50 citations89
USD311704SOct 30, 1990
Pavement marker
MINNESOTA MINING & MFG9 citations74
3M INNOVATIVE PROPERTIES CO
8 patentsUS6451874B1Sep 17, 2002
Liquid pavement marking compositions
3M INNOVATIVE PROPERTIES CO67 citations95
US6166106ADec 26, 2000
Liquid pavement marking compositions
3M INNOVATIVE PROPERTIES CO49 citations95
US6126360AOct 3, 2000
Raised retroreflective pavement marker
3M INNOVATIVE PROPERTIES CO38 citations91
US6511259B1Jan 28, 2003
Particle dispenser with fluid assist to control particle velocity for use on a moving vehicle
3M INNOVATIVE PROPERTIES CO15 citations83
US6790880B2Sep 14, 2004
Liquid pavement marking compositions
3M INNOVATIVE PROPERTIES CO12 citations81
USRE40729EJun 9, 2009
Liquid pavement marking compositions
3M INNOVATIVE PROPERTIES CO6 citations73
USRE40088EFeb 19, 2008
Liquid pavement marking compositions
3M INNOVATIVE PROPERTIES CO3 citations58
US9837001B2Dec 5, 2017
Signage overlay article
3M INNOVATIVE PROPERTIES CO0 citations51