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Douglas D. Colby

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  • Clarkston, MI, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Removable orifice plate device
    • Patent number 9,926,759
    • Issue date Mar 27, 2018
    • Q.E.D. Environmental Systems, Inc.
    • Douglas D. Colby
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Fine control gas valve
    • Patent number 9,695,945
    • Issue date Jul 4, 2017
    • Q.E.D. Environmental Systems, Inc.
    • Douglas D. Colby
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Molded well head cover
    • Patent number 9,068,421
    • Issue date Jun 30, 2015
    • Graco Minnesota Inc.
    • Douglas D. Colby
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Fine control gas valve
    • Patent number 8,800,597
    • Issue date Aug 12, 2014
    • Graco Minnesota Inc.
    • Douglas D. Colby
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Variable thickness pin clamp
    • Patent number 7,686,286
    • Issue date Mar 30, 2010
    • Delaware Capital Formation, Inc.
    • Douglas D. Colby
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Hook clamp unit
    • Patent number 7,669,840
    • Issue date Mar 2, 2010
    • Delaware Capital Formation, Inc.
    • Liu Xu
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Power clamp
    • Patent number 7,314,214
    • Issue date Jan 1, 2008
    • Delaware Capital Formation, Inc.
    • Douglas D. Colby
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Hook pin unit having weld slag protection
    • Patent number 7,311,301
    • Issue date Dec 25, 2007
    • Delaware Capital Formation, Inc.
    • Xu Liu
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Cylinder lock
    • Patent number 6,832,539
    • Issue date Dec 21, 2004
    • Delaware Capital Formation, Inc.
    • Douglas D. Colby
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Power clamp mechanism
    • Patent number 6,655,673
    • Issue date Dec 2, 2003
    • Delaware Capital Formation, Inc.
    • Douglas D. Colby
    • Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Information Patent Grant

    Locking power clamp
    • Patent number 6,386,598
    • Issue date May 14, 2002
    • Delaware Capital Formation, Inc.
    • Henry Dykstra
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Amplified hold-down clamp
    • Patent number 5,961,109
    • Issue date Oct 5, 1999
    • Delaware Capital Formation, Inc.
    • Henry Dykstra
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS

Patents Applicationslast 30 patents

  • Information Patent Application

    GROUNDWATER SAMPLING PUMP
    • Publication number 20200256342
    • Publication date Aug 13, 2020
    • Q.E.D. ENVIRONMENTAL SYSTEMS, INC.
    • Douglas D. COLBY
    • E21 - EARTH DRILLING MINING
  • Information Patent Application

    Pump Having Edge Mounted O-Ring Seal
    • Publication number 20180058464
    • Publication date Mar 1, 2018
    • Q.E.D. ENVIRONMENTAL SYSTEMS, INC.
    • Douglas D. COLBY
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Groundwater Sampling Pump
    • Publication number 20160298632
    • Publication date Oct 13, 2016
    • QED Environmental Systems, Inc.
    • Douglas D. COLBY
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    REMOVABLE ORIFICE PLATE DEVICE
    • Publication number 20150376969
    • Publication date Dec 31, 2015
    • Q.E.D. ENVIRONMENTAL SYSTEMS, INC.
    • Douglas D. Colby
    • G01 - MEASURING TESTING
  • Information Patent Application

    FINE CONTROL GAS VALVE
    • Publication number 20140283930
    • Publication date Sep 25, 2014
    • Douglas D. COLBY
    • Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Information Patent Application

    MOLDED WELL HEAD COVER
    • Publication number 20140110099
    • Publication date Apr 24, 2014
    • QED Environmental Systems, Inc.
    • Douglas D. Colby
    • E21 - EARTH DRILLING MINING
  • Information Patent Application

    REMOVABLE ORIFICE PLATE DEVICE
    • Publication number 20130180703
    • Publication date Jul 18, 2013
    • Q.E.D. ENVIRONMENTAL SYSTEMS, INC.
    • Douglas D. Colby
    • G01 - MEASURING TESTING
  • Information Patent Application

    FINE CONTROL GAS VALVE
    • Publication number 20120261601
    • Publication date Oct 18, 2012
    • QED Environmental Systems, Inc.
    • Douglas D. Colby
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    CAM-BOLT ASSEMBLY
    • Publication number 20110176865
    • Publication date Jul 21, 2011
    • QED Environmental Systems, Inc.
    • Douglas D. Colby
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Variable thickness pin clamp
    • Publication number 20070045362
    • Publication date Mar 1, 2007
    • Douglas D. Colby
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Power clamp
    • Publication number 20060290042
    • Publication date Dec 28, 2006
    • Douglas D. Colby
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Hook clamp unit
    • Publication number 20060163790
    • Publication date Jul 27, 2006
    • Delaware Capital Formation, Inc.
    • Liu Xu
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Hook pin unit having weld slag protection
    • Publication number 20060103063
    • Publication date May 18, 2006
    • Delaware Capital Formation, Inc.
    • Xu Liu
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Cylinder lock
    • Publication number 20040007127
    • Publication date Jan 15, 2004
    • Douglas D. Colby
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    New power clamp mechanism
    • Publication number 20020043751
    • Publication date Apr 18, 2002
    • Douglas D. Colby
    • Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC