TREA

Douglas D. Fletcher

Follow

Person

  • Woodbury, MN, US
People

Patents Grantslast 30 patents

  • Information Patent Grant

    Air filter condition sensing
    • Patent number 11,617,980
    • Issue date Apr 4, 2023
    • 3M Innovative Properties Company
    • Jonathan B. Arthur
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Air filter condition sensing
    • Patent number 11,607,635
    • Issue date Mar 21, 2023
    • 3M Innovative Properties Company
    • Jonathan B. Arthur
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Hearing protector
    • Patent number D978443
    • Issue date Feb 14, 2023
    • 3M Innovative Properties Company
    • Gregory G. Jager
    • D29 - Equipment for safety, protection, and rescue
  • Information Patent Grant

    Adaptive electronic hearing protection device
    • Patent number 11,504,278
    • Issue date Nov 22, 2022
    • 3M Innovative Properties Company
    • Oscar M. Hemberg
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Grant

    Air filter condition sensing
    • Patent number 11,202,982
    • Issue date Dec 21, 2021
    • 3M Innovative Properties Company
    • Jonathan B. Arthur
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Comfort headband for hearing protectors
    • Patent number 10,722,404
    • Issue date Jul 28, 2020
    • 3M Innovative Properties Company
    • Nicolas A. Echeverri
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Grant

    Air filter condition sensing
    • Patent number 10,646,809
    • Issue date May 12, 2020
    • 3M Innovative Properties Company
    • Jonathan B. Arthur
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Air filter condition sensing
    • Patent number 10,363,509
    • Issue date Jul 30, 2019
    • 3M Innovative Properties Company
    • Jonathan B. Arthur
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Hearing protector with compartment for rechargeable battery pack
    • Patent number 10,172,742
    • Issue date Jan 8, 2019
    • 3M Innovative Properties Company
    • Douglas D. Fletcher
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Hearing protector headband
    • Patent number D830642
    • Issue date Oct 9, 2018
    • 3M Innovative Properties Company
    • Douglas D. Fletcher
    • D29 - Equipment for safety, protection, and rescue
  • Information Patent Grant

    Hearing protector
    • Patent number D807584
    • Issue date Jan 9, 2018
    • 3M Innovative Properties Company
    • Douglas D. Fletcher
    • D29 - Equipment for safety, protection, and rescue
  • Information Patent Grant

    Hearing protector headband
    • Patent number D807585
    • Issue date Jan 9, 2018
    • 3M Innovative Properties Company
    • Douglas D. Fletcher
    • D29 - Equipment for safety, protection, and rescue
  • Information Patent Grant

    Hearing protector headband
    • Patent number D805257
    • Issue date Dec 12, 2017
    • 3M Innovative Properties Company
    • Edvard B. E. Maansson
    • D29 - Equipment for safety, protection, and rescue
  • Information Patent Grant

    Battery pack
    • Patent number D795801
    • Issue date Aug 29, 2017
    • 3M Innovative Properties Company
    • Douglas D. Fletcher
    • D13 - Equipment for production, distribution, or transformation of energy
  • Information Patent Grant

    Adaptive frequency response, adaptive automatic level control and h...
    • Patent number 9,628,897
    • Issue date Apr 18, 2017
    • 3M Innovative Properties Company
    • Douglas D. Fletcher
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Grant

    Hearing protector
    • Patent number D766520
    • Issue date Sep 13, 2016
    • 3M Innovative Properties Company
    • Douglas D. Fletcher
    • D29 - Equipment for safety, protection, and rescue
  • Information Patent Grant

    Hearing protector
    • Patent number D764717
    • Issue date Aug 23, 2016
    • 3M Innovative Properties Company
    • Douglas D. Fletcher
    • D29 - Equipment for safety, protection, and rescue
  • Information Patent Grant

    Hearing protector headband
    • Patent number D763518
    • Issue date Aug 9, 2016
    • 3M Innovative Properties Company
    • Douglas D. Fletcher
    • D29 - Equipment for safety, protection, and rescue
  • Information Patent Grant

    Hearing protector
    • Patent number D753884
    • Issue date Apr 12, 2016
    • 3M Innovative Properties Company
    • Brenda M. Bonney
    • D29 - Equipment for safety, protection, and rescue
  • Information Patent Grant

    Hearing protector
    • Patent number D752816
    • Issue date Mar 29, 2016
    • 3M Innovative Properties Company
    • Douglas D. Fletcher
    • D29 - Equipment for safety, protection, and rescue
  • Information Patent Grant

    Hearing protector
    • Patent number D747557
    • Issue date Jan 12, 2016
    • 3M Innovative Properties Company
    • Brenda M. Bonney
    • D29 - Equipment for safety, protection, and rescue
  • Information Patent Grant

    Hearing protector
    • Patent number D736475
    • Issue date Aug 11, 2015
    • 3M Innovative Properties Company
    • Douglas D. Fletcher
    • D29 - Equipment for safety, protection, and rescue
  • Information Patent Grant

    Wireless intercom system
    • Patent number 7,103,392
    • Issue date Sep 5, 2006
    • 3M Innovative Properties Company
    • Douglas D. Fletcher
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Cable installing method and apparatus
    • Patent number 6,416,010
    • Issue date Jul 9, 2002
    • Douglas D. Fletcher
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Cable installing method and apparatus
    • Patent number 6,267,355
    • Issue date Jul 31, 2001
    • Douglas D. Fletcher
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Page holding bookmark
    • Patent number 5,427,414
    • Issue date Jun 27, 1995
    • Douglas D. Fletcher
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER

Patents Applicationslast 30 patents

  • Information Patent Application

    AIR FILTER CONDITION SENSING
    • Publication number 20220088525
    • Publication date Mar 24, 2022
    • 3M Innovative Properties Company
    • Jonathan B. Arthur
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    AIR FILTER CONDITION SENSING
    • Publication number 20210346833
    • Publication date Nov 11, 2021
    • 3M Innovative Properties Company
    • Jonathan B. Arthur
    • G01 - MEASURING TESTING
  • Information Patent Application

    AIR FILTER CONDITION SENSING
    • Publication number 20200391151
    • Publication date Dec 17, 2020
    • 3M Innovative Properties Company
    • Jonathan B. Arthur
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Application

    NOISE SIMULATING BOOTH FOR SAFELY TESTING AND DEMONSTRATING HEARING...
    • Publication number 20200178012
    • Publication date Jun 4, 2020
    • 3M Innovative Properties Company
    • Douglas D. Fletcher
    • G06 - COMPUTING CALCULATING COUNTING
  • Information Patent Application

    ADAPTIVE ELECTRONIC HEARING PROTECTION DEVICE
    • Publication number 20200030151
    • Publication date Jan 30, 2020
    • 3M Innovative Properties Company
    • Oscar M. Hemberg
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Application

    AIR FILTER CONDITION SENSING
    • Publication number 20190291037
    • Publication date Sep 26, 2019
    • 3M Innovative Properties Company
    • Jonathan B. Arthur
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    AIR FILTER CONDITION SENSING
    • Publication number 20190262756
    • Publication date Aug 29, 2019
    • 3M Innovative Properties Company
    • Jonathan B. Arthur
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Application

    AIR FILTER CONDITION SENSING
    • Publication number 20180140989
    • Publication date May 24, 2018
    • 3M Innovative Properties Company
    • Jonathan B. Arthur
    • G01 - MEASURING TESTING
  • Information Patent Application

    HEARING PROTECTOR WITH COMPARTMENT FOR RECHARGEABLE BATTERY PACK
    • Publication number 20180014972
    • Publication date Jan 18, 2018
    • 3M Innovative Properties Company
    • Douglas D. Fletcher
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Application

    COMFORT HEADBAND FOR HEARING PROTECTORS
    • Publication number 20180014973
    • Publication date Jan 18, 2018
    • 3M Innovative Properties Company
    • Nicolas A. Echeverri
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Application

    ADAPTIVE FREQUENCY RESPONSE, ADAPTIVE AUTOMATIC LEVEL CONTROL AND H...
    • Publication number 20150117660
    • Publication date Apr 30, 2015
    • 3M Innovative Properties Company
    • Douglas D. Fletcher
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Application

    OCCUPANT ABANDONMENT SENSOR FOR AUTOMOTIVE VEHICLES
    • Publication number 20070285218
    • Publication date Dec 13, 2007
    • 3M Innovative Properties Company
    • Douglas D. Fletcher
    • B60 - VEHICLES IN GENERAL
  • Information Patent Application

    Wireless intercom system
    • Publication number 20030134666
    • Publication date Jul 17, 2003
    • Douglas D. Fletcher
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Cable installing method and apparatus
    • Publication number 20010030257
    • Publication date Oct 18, 2001
    • Douglas D. Fletcher
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL