Inventor · disambiguated record
Douglas D. Fletcher
Also filed as: FLETCHER DOUGLAS D
26 granted patents·2 pending applications·569 citations·filing 1994–2021
97Inventor score
Top patents by PatentIndex Score
28 records- 0196US10363509B2Air filter condition sensing3M INNOVATIVE PROPERTIES CO·Filed 2018·Granted Jul 30, 2019·11 cites·21 claims
- 0295US11607635B2Air filter condition sensing3M INNOVATIVE PROPERTIES COMPANY·Filed 2017·Granted Mar 21, 2023·8 cites·14 claims
- 0393USD807584SHearing protector3M INNOVATIVE PROPERTIES CO·Filed 2015·Granted Jan 9, 2018·48 cites·1 claims
- 0493USD752816SHearing protector3M INNOVATIVE PROPERTIES CO·Filed 2014·Granted Mar 29, 2016·56 cites·1 claims
- 0592USD753884SHearing protector3M INNOVATIVE PROPERTIES CO·Filed 2013·Granted Apr 12, 2016·53 cites·1 claims
- 0692USD747557SHearing protector3M INNOVATIVE PROPERTIES CO·Filed 2014·Granted Jan 12, 2016·55 cites·1 claims
- 0791US11202982B2Air filter condition sensing3M INNOVATIVE PROPERTIES CO·Filed 2020·Granted Dec 21, 2021·2 cites·21 claims
- 0889USD766520SHearing protector3M INNOVATIVE PROPERTIES CO·Filed 2015·Granted Sep 13, 2016·44 cites·1 claims
- 0989USD764717SHearing protector3M INNOVATIVE PROPERTIES CO·Filed 2015·Granted Aug 23, 2016·40 cites·1 claims
- 1089USD736475SHearing protector3M INNOVATIVE PROPERTIES CO·Filed 2013·Granted Aug 11, 2015·43 cites·1 claims
- 1188US10646809B2Air filter condition sensing3M INNOVATIVE PROPERTIES CO·Filed 2019·Granted May 12, 2020·2 cites·20 claims
- 1286USD763518SHearing protector headband3M INNOVATIVE PROPERTIES CO·Filed 2015·Granted Aug 9, 2016·31 cites·1 claims
- 1383US7103392B2Wireless intercom system3M INNOVATIVE PROPERTIES CO·Filed 2002·Granted Sep 5, 2006·41 cites·11 claims
- 1482USD805257SHearing protector headband3M INNOVATIVE PROPERTIES CO·Filed 2016·Granted Dec 12, 2017·23 cites·1 claims
- 1582USD795801SBattery pack3M INNOVATIVE PROPERTIES CO·Filed 2016·Granted Aug 29, 2017·21 cites·1 claims
- 1682US9628897B2Adaptive frequency response, adaptive automatic level control and handling radio communications for a hearing protector3M INNOVATIVE PROPERTIES CO·Filed 2014·Granted Apr 18, 2017·6 cites·20 claims
- 1779US11617980B2Air filter condition sensing3M INNOVATIVE PROPERTIES COMPANY·Filed 2021·Granted Apr 4, 2023·0 cites·20 claims
- 1879USD807585SHearing protector headband3M INNOVATIVE PROPERTIES CO·Filed 2015·Granted Jan 9, 2018·19 cites·1 claims
- 1979US6267355B1Cable installing method and apparatusFiled 1999·Granted Jul 31, 2001·22 cites·7 claims
- 2078US10172742B2Hearing protector with compartment for rechargeable battery pack3M INNOVATIVE PROPERTIES CO·Filed 2016·Granted Jan 8, 2019·3 cites·20 claims
- 2175US6416010B2Cable installing method and apparatusFiled 2001·Granted Jul 9, 2002·11 cites·7 claims
- 2270USD978443SHearing protector3M INNOVATIVE PROPERTIES COMPANY·Filed 2020·Granted Feb 14, 2023·5 cites·1 claims
- 2366USD830642SHearing protector headband3M INNOVATIVE PROPERTIES CO·Filed 2017·Granted Oct 9, 2018·11 cites·1 claims
- 2465US10722404B2Comfort headband for hearing protectors3M INNOVATIVE PROPERTIES CO·Filed 2016·Granted Jul 28, 2020·1 cites·18 claims
- 2546US11504278B2Adaptive electronic hearing protection device3M INNOVATIVE PROPERTIES COMPANY·Filed 2017·Granted Nov 22, 2022·0 cites·19 claims
- 2639US5427414APage holding bookmarkFiled 1994·Granted Jun 27, 1995·13 cites·3 claims
- 2739US2007285218A1Occupant abandonment sensor for automotive vehicles3M INNOVATIVE PROPERTIES CO·Filed 2006·Application pending·0 cites
- 2838US2020178012A1Noise simulating booth for safely testing and demonstrating hearing protection equipment3M INNOVATIVE PROPERTIES CO·Filed 2017·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →