Inventor
LUTGRING DAVID M
US5 patents
⚠️ This page may combine multiple inventors who share the name “LUTGRING DAVID M”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
3M INNOVATIVE PROPERTIES CO
4 patentsUSD632677SFeb 15, 2011
Ear bud body shape
3M INNOVATIVE PROPERTIES CO79 citations97
USD632678SFeb 15, 2011
Ear bud shaft and taper
3M INNOVATIVE PROPERTIES CO23 citations92
USD738112SSep 8, 2015
Portable charging storage case
3M INNOVATIVE PROPERTIES CO6 citations82
US9636259B2May 2, 2017
Water resistant acoustic port in ear-mouthed hearing device
3M INNOVATIVE PROPERTIES CO3 citations71