Inventor
FLETCHER DOUGLAS D
US26 patents
⚠️ This page may combine multiple inventors who share the name “FLETCHER DOUGLAS D”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
3M INNOVATIVE PROPERTIES CO
19 patentsUSD807584SJan 9, 2018
Hearing protector
3M INNOVATIVE PROPERTIES CO48 citations98
USD752816SMar 29, 2016
Hearing protector
3M INNOVATIVE PROPERTIES CO56 citations97
USD753884SApr 12, 2016
Hearing protector
3M INNOVATIVE PROPERTIES CO53 citations96
USD747557SJan 12, 2016
Hearing protector
3M INNOVATIVE PROPERTIES CO55 citations96
USD807585SJan 9, 2018
Hearing protector headband
3M INNOVATIVE PROPERTIES CO19 citations94
USD795801SAug 29, 2017
Battery pack
3M INNOVATIVE PROPERTIES CO21 citations94
USD764717SAug 23, 2016
Hearing protector
3M INNOVATIVE PROPERTIES CO40 citations93
USD763518SAug 9, 2016
Hearing protector headband
3M INNOVATIVE PROPERTIES CO31 citations93
USD736475SAug 11, 2015
Hearing protector
3M INNOVATIVE PROPERTIES CO43 citations93
USD805257SDec 12, 2017
Hearing protector headband
3M INNOVATIVE PROPERTIES CO23 citations92
US10363509B2Jul 30, 2019
Air filter condition sensing
3M INNOVATIVE PROPERTIES CO11 citations91
USD766520SSep 13, 2016
Hearing protector
3M INNOVATIVE PROPERTIES CO44 citations91
US7103392B2Sep 5, 2006
Wireless intercom system
3M INNOVATIVE PROPERTIES CO41 citations90
USD830642SOct 9, 2018
Hearing protector headband
3M INNOVATIVE PROPERTIES CO11 citations81
US10172742B2Jan 8, 2019
Hearing protector with compartment for rechargeable battery pack
3M INNOVATIVE PROPERTIES CO3 citations73
US9628897B2Apr 18, 2017
Adaptive frequency response, adaptive automatic level control and handling radio communications for a hearing protector
3M INNOVATIVE PROPERTIES CO6 citations73
US11202982B2Dec 21, 2021
Air filter condition sensing
3M INNOVATIVE PROPERTIES CO2 citations72
US10646809B2May 12, 2020
Air filter condition sensing
3M INNOVATIVE PROPERTIES CO2 citations72
US10722404B2Jul 28, 2020
Comfort headband for hearing protectors
3M INNOVATIVE PROPERTIES CO1 citations62
3M INNOVATIVE PROPERTIES COMPANY
4 patentsUS11607635B2Mar 21, 2023
Air filter condition sensing
3M INNOVATIVE PROPERTIES COMPANY8 citations84
USD978443SFeb 14, 2023
Hearing protector
3M INNOVATIVE PROPERTIES COMPANY5 citations69
US11617980B2Apr 4, 2023
Air filter condition sensing
3M INNOVATIVE PROPERTIES COMPANY0 citations61
US11504278B2Nov 22, 2022
Adaptive electronic hearing protection device
3M INNOVATIVE PROPERTIES COMPANY0 citations58