Inventor
ENGEBRETSON JOSEPH D
US4 patents
⚠️ This page may combine multiple inventors who share the name “ENGEBRETSON JOSEPH D”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
3M INNOVATIVE PROPERTIES CO
3 patentsUS10858496B2Dec 8, 2020
Durable retroreflective elements with a blend of beads
3M INNOVATIVE PROPERTIES CO4 citations70
US11286368B2Mar 29, 2022
Durable retroreflective elements with a blend of beads
3M INNOVATIVE PROPERTIES CO0 citations59
US10605967B2Mar 31, 2020
Retroreflective elements including particles
3M INNOVATIVE PROPERTIES CO0 citations45