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David Kreutzman

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  • Louisville, CO, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Channel strut fasteners
    • Patent number 11,885,364
    • Issue date Jan 30, 2024
    • D Three Enterprises, LLC
    • Richard F. Schaefer
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Channel strut fasteners
    • Patent number 11,624,395
    • Issue date Apr 11, 2023
    • D Three Enterprises, LLC
    • Richard F. Schaefer
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Channel strut fasteners
    • Patent number 11,624,394
    • Issue date Apr 11, 2023
    • D Three Enterprises, LLC
    • Richard F. Schaefer
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Roof mount bracket
    • Patent number 10,840,851
    • Issue date Nov 17, 2020
    • D Three Enterprises LLC
    • Richard F. Schaefer
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Grant

    Renewable energy hot water heater with heat pump
    • Patent number 10,571,135
    • Issue date Feb 25, 2020
    • David Kreutzman
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Grant

    Micro-grid PV system hybrid hot water heater
    • Patent number 10,066,851
    • Issue date Sep 4, 2018
    • David Kreutzman
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    End clip for recessed rail
    • Patent number 9,714,671
    • Issue date Jul 25, 2017
    • Richard F. Schaefer
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Adjustable combined flashing and mounting apparatus and method of m...
    • Patent number 9,680,409
    • Issue date Jun 13, 2017
    • D Three Enterprises, LLC
    • Richard F. Schaefer
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Adjustable roof mounting system
    • Patent number 9,620,870
    • Issue date Apr 11, 2017
    • D Three Enterprises, LLC
    • Richard F. Schaefer
    • E04 - BUILDING
  • Information Patent Grant

    End clip for recessed rail
    • Patent number 9,473,064
    • Issue date Oct 18, 2016
    • Richard F. Schaefer
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Micro-grid PV system
    • Patent number 9,453,658
    • Issue date Sep 27, 2016
    • David Kreutzman
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Adjustable roof mounting system
    • Patent number 9,106,023
    • Issue date Aug 11, 2015
    • D Three Enterprises, LLC
    • Richard F. Schaefer
    • E04 - BUILDING
  • Information Patent Grant

    Roof standoff device
    • Patent number 9,068,339
    • Issue date Jun 30, 2015
    • D Three Enterprises, LLC
    • Richard F. Schaefer
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    PV water heating system
    • Patent number 9,002,185
    • Issue date Apr 7, 2015
    • David Kreutzman
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Grant

    Renewable energy hot water heating elements
    • Patent number 8,977,117
    • Issue date Mar 10, 2015
    • David Kreutzman
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Control systems for renewable hot water heating systems
    • Patent number 8,909,033
    • Issue date Dec 9, 2014
    • David Kreutzman
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Interlocking shape for use in construction members
    • Patent number 8,869,490
    • Issue date Oct 28, 2014
    • D Three Enterprises, LLC
    • Richard F. Schaefer
    • E04 - BUILDING
  • Information Patent Grant

    Roof mount sealing assembly
    • Patent number 8,833,032
    • Issue date Sep 16, 2014
    • D Three Enterprises, LLC
    • Richard F. Schaefer
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Roof mount sealing assembly
    • Patent number 8,833,033
    • Issue date Sep 16, 2014
    • D Three Enterprises, LLC
    • Richard F. Schaefer
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Adjustable roof mounting system
    • Patent number 8,752,338
    • Issue date Jun 17, 2014
    • D Three Enterprises, LLC
    • Richard F. Schaefer
    • E04 - BUILDING
  • Information Patent Grant

    Roof mount sealing assembly
    • Patent number 8,707,655
    • Issue date Apr 29, 2014
    • D Three Enterprises, LLC
    • Richard F. Schaefer
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Roof mount sealing assembly
    • Patent number 8,707,654
    • Issue date Apr 29, 2014
    • D Three Enterprises, LLC
    • Richard F. Schaefer
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Roof mount sealing assembly
    • Patent number 8,689,517
    • Issue date Apr 8, 2014
    • D Three Enterprises, LLC
    • Richard F. Schaefer
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Interlocking shape for use in construction members
    • Patent number 8,661,765
    • Issue date Mar 4, 2014
    • D Three Enterprises, LLC
    • Richard F. Schaefer
    • E04 - BUILDING
  • Information Patent Grant

    Flashing assembly
    • Patent number 8,479,455
    • Issue date Jul 9, 2013
    • D Three Enterprises
    • Richard F. Schaefer
    • E04 - BUILDING
  • Information Patent Grant

    Roof mount sealing assembly
    • Patent number 8,448,405
    • Issue date May 28, 2013
    • D Three Enterprises, LLC
    • Richard F. Schaefer
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Dual faced interlocking support member
    • Patent number D639143
    • Issue date Jun 7, 2011
    • D Three Enterprises, LLC
    • Richard F. Schaefer
    • D08 - Tools and hardware
  • Information Patent Grant

    Four faced interlocking support member
    • Patent number D639144
    • Issue date Jun 7, 2011
    • D Three Enterprises, LLC
    • Richard F. Schaefer
    • D08 - Tools and hardware
  • Information Patent Grant

    Single jaw interlocking support post
    • Patent number D636656
    • Issue date Apr 26, 2011
    • D Three Enterprises, LLC
    • Richard F. Schaefer
    • D08 - Tools and hardware
  • Information Patent Grant

    Interlocking support post
    • Patent number D617174
    • Issue date Jun 8, 2010
    • D Three Enterprises, LLC
    • Richard F. Schaefer
    • D08 - Tools and hardware

Patents Applicationslast 30 patents

  • Information Patent Application

    CHANNEL STRUT FASTENERS
    • Publication number 20240301910
    • Publication date Sep 12, 2024
    • D Three Enterprises LLC
    • Richard Schaefer
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    CHANNEL STRUT FASTENERS
    • Publication number 20220252100
    • Publication date Aug 11, 2022
    • D Three Enterprises LLC
    • Richard F. Schaefer
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    CHANNEL STRUT FASTENERS
    • Publication number 20220128085
    • Publication date Apr 28, 2022
    • D Three Enterprises LLC
    • Richard F. Schaefer
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    CHANNEL STRUT FASTENERS
    • Publication number 20220128084
    • Publication date Apr 28, 2022
    • D Three Enterprises LLC
    • Richard F. Schaefer
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    ROOF MOUNT BRACKET
    • Publication number 20190081590
    • Publication date Mar 14, 2019
    • D Three Enterprises LLC
    • Richard F. Schaefer
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    MICRO-GRID PV SYSTEM HYBRID HOT WATER HEATER
    • Publication number 20190072296
    • Publication date Mar 7, 2019
    • David Kreutzman
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    CONTROL SYSTEMS FOR RENEWABLE HOT WATER HEATING SYSTEMS
    • Publication number 20180313578
    • Publication date Nov 1, 2018
    • David Kreutzman
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Application

    ADJUSTABLE COMBINED FLASHING AND MOUNTING APPARATUS AND METHOD OF M...
    • Publication number 20180152133
    • Publication date May 31, 2018
    • D Three Enterprises LLC
    • Richard F. Schaefer
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Application

    END CLIP FOR RECESSED RAIL
    • Publication number 20170146041
    • Publication date May 25, 2017
    • Richard F. Schaefer
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    ADJUSTABLE ROOF MOUNTING SYSTEM
    • Publication number 20160118726
    • Publication date Apr 28, 2016
    • D THREE ENTERPRISES, LLC
    • Richard F. Schaefer
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    END CLIP FOR RECESSED RAIL
    • Publication number 20160108941
    • Publication date Apr 21, 2016
    • Richard F. Schaefer
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    RENEWABLE ENERGY HOT WATER HEATER WITH HEAT PUMP
    • Publication number 20150354833
    • Publication date Dec 10, 2015
    • David Kreutzman
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Application

    ADJUSTABLE COMBINED FLASHING AND MOUNTING APPARATUS AND METHOD OF M...
    • Publication number 20150270802
    • Publication date Sep 24, 2015
    • D THREE ENTERPRISES, LLC
    • Richard F. Schaefer
    • E04 - BUILDING
  • Information Patent Application

    ROOF MOUNT SEALING ASSEMBLY
    • Publication number 20150218824
    • Publication date Aug 6, 2015
    • Richard F. Schaefer
    • E04 - BUILDING
  • Information Patent Application

    CONTROL SYSTEMS FOR RENEWABLE HOT WATER HEATING SYSTEMS
    • Publication number 20150139630
    • Publication date May 21, 2015
    • David Kreutzman
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Application

    ATTACHMENT DEVICE
    • Publication number 20150129516
    • Publication date May 14, 2015
    • D THREE ENTERPRISES, LLC
    • Richard F. Schaefer
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Application

    COMBINATION MOUNTING AND GROUNDING CLIP
    • Publication number 20150104239
    • Publication date Apr 16, 2015
    • D THREE ENTERPRISES, LLC
    • Richard F. Schaefer
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    INTERLOCKING SHAPE FOR USE IN CONSTRUCTION MEMBERS
    • Publication number 20150013237
    • Publication date Jan 15, 2015
    • D THREE ENTERPRISES, LLC
    • Richard F. Schaefer
    • E04 - BUILDING
  • Information Patent Application

    MICRO-GRID PV SYSTEM HYBRID HOT WATER HEATER
    • Publication number 20140348493
    • Publication date Nov 27, 2014
    • David Kreutzman
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    ADJUSTABLE ROOF MOUNTING SYSTEM
    • Publication number 20140273559
    • Publication date Sep 18, 2014
    • D THREE ENTERPRISES, LLC
    • Richard F. Schaefer
    • E04 - BUILDING
  • Information Patent Application

    MICRO-GRID PV SYSTEM
    • Publication number 20140265573
    • Publication date Sep 18, 2014
    • David Kreutzman
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    ROOF MOUNT SEALING ASSEMBLY
    • Publication number 20140208680
    • Publication date Jul 31, 2014
    • D THREE ENTERPRISES, LLC
    • Richard F. Schaefer
    • E04 - BUILDING
  • Information Patent Application

    ROOF MOUNT SEALING ASSEMBLY
    • Publication number 20140208664
    • Publication date Jul 31, 2014
    • D THREE ENTERPRISES, LLC
    • Richard F. Schaefer
    • E04 - BUILDING
  • Information Patent Application

    Interlocking Shape for Use in Construction Members
    • Publication number 20140190090
    • Publication date Jul 10, 2014
    • D THREE ENTERPRISES, LLC
    • Richard F. Schaefer
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Application

    Roof Mount Sealing Assembly
    • Publication number 20140008506
    • Publication date Jan 9, 2014
    • D THREE ENTERPRISES, LLC
    • Richard F. Schaefer
    • E04 - BUILDING
  • Information Patent Application

    Roof Mount Sealing Assembly
    • Publication number 20140007532
    • Publication date Jan 9, 2014
    • D THREE ENTERPRISES, LLC
    • Richard F. Schaefer
    • E04 - BUILDING
  • Information Patent Application

    Adjustable roof mounting system
    • Publication number 20130291479
    • Publication date Nov 7, 2013
    • Richard F. Schaefer
    • E04 - BUILDING
  • Information Patent Application

    Roof mount sealing assembly
    • Publication number 20130292531
    • Publication date Nov 7, 2013
    • Richard F. Schaefer
    • E04 - BUILDING
  • Information Patent Application

    Hybrid Gas-Electric Hot Water Heater
    • Publication number 20130266295
    • Publication date Oct 10, 2013
    • David Kreutzman
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Application

    Control Systems for Renewable Hot Water Heating Systems
    • Publication number 20130266296
    • Publication date Oct 10, 2013
    • David Kreutzman
    • F24 - HEATING RANGES VENTILATING