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Mitchell I. Kieffer

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  • Minneapolis, MN, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Ladder tripod assembly and system
    • Patent number 11,795,760
    • Issue date Oct 24, 2023
    • Core Distribution, Inc.
    • Allen A. Caldwell
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Grant

    Locking assembly for a telescoping ladder
    • Patent number 11,174,678
    • Issue date Nov 16, 2021
    • Core Distribution, Inc.
    • Mitchell I. Kieffer
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Grant

    Telescoping ladder with a cascading collapse mechanism
    • Patent number 10,995,547
    • Issue date May 4, 2021
    • Core Distribution, Inc.
    • Mitchell I. Kieffer
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Grant

    Extendable / retractable ladder
    • Patent number 10,753,149
    • Issue date Aug 25, 2020
    • Core Distribution, Inc.
    • Mitchell I. Kieffer
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Grant

    Foldable ladder
    • Patent number 10,731,413
    • Issue date Aug 4, 2020
    • Core Distribution, Inc.
    • Mitchell I. Kieffer
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Grant

    Foldable ladder
    • Patent number 10,233,692
    • Issue date Mar 19, 2019
    • Core Distribution, Inc.
    • Mitchell I. Kieffer
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Grant

    Extendable / retractable ladder
    • Patent number 10,053,912
    • Issue date Aug 21, 2018
    • Core Distribution, Inc.
    • Mitchell I. Kieffer
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Grant

    Foldable ladder
    • Patent number 9,580,959
    • Issue date Feb 28, 2017
    • Core Distribution, Inc.
    • Mitchell I. Kieffer
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Grant

    Hinge for a telescoping stepladder
    • Patent number D767784
    • Issue date Sep 27, 2016
    • Core Distribution, Inc.
    • Mitchell I. Kieffer
    • D25 - Building units and construction elements
  • Information Patent Grant

    Telescoping ladder with stabilizers
    • Patent number 9,416,591
    • Issue date Aug 16, 2016
    • Core Distribution, Inc.
    • Mitchell I. Kieffer
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Grant

    Collapsible five legged stepstool
    • Patent number D684278
    • Issue date Jun 11, 2013
    • Core Distribution, Inc.
    • Mitchell I. Kieffer
    • D25 - Building units and construction elements
  • Information Patent Grant

    Ergonomic extendable/retractable ladder
    • Patent number 8,387,753
    • Issue date Mar 5, 2013
    • Core Distribution, Inc.
    • Mitchell I. Kieffer
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Grant

    Extendable/retractable ladder
    • Patent number 8,225,906
    • Issue date Jul 24, 2012
    • Core Distribution, Inc.
    • Mitchell I. Kieffer
    • Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Information Patent Grant

    Step ladder
    • Patent number D624200
    • Issue date Sep 21, 2010
    • Core Distribution, Inc.
    • Mitchell I. Kieffer
    • D25 - Building units and construction elements
  • Information Patent Grant

    Telescoping ladder rung
    • Patent number D593685
    • Issue date Jun 2, 2009
    • Core Distribution, Inc.
    • Mitchell I. Kieffer
    • D25 - Building units and construction elements
  • Information Patent Grant

    Extending ladder and associated manufacturing methods
    • Patent number 7,048,094
    • Issue date May 23, 2006
    • Core Distribution, Inc.
    • Mitchell I. Kieffer
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Grant

    Extending ladder and associated manufacturing methods
    • Patent number 6,883,645
    • Issue date Apr 26, 2005
    • Core Distribution, Inc.
    • Mitchell I. Kieffer
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Grant

    Extending ladder and associated manufacturing methods
    • Patent number 6,708,800
    • Issue date Mar 23, 2004
    • Core Distribution, Inc.
    • Mitchell I. Kieffer
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS

Patents Applicationslast 30 patents

  • Information Patent Application

    LADDER TRIPOD ASSEMBLY AND SYSTEM
    • Publication number 20210123302
    • Publication date Apr 29, 2021
    • CORE DISTRIBUTION, INC.
    • Allen A. Caldwell
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Application

    LOCKING ASSEMBLY FOR A TELESCOPING LADDER
    • Publication number 20190136623
    • Publication date May 9, 2019
    • CORE DISTRIBUTION, INC.
    • Mitchell I. Kieffer
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Application

    FOLDABLE LADDER
    • Publication number 20190093428
    • Publication date Mar 28, 2019
    • CORE DISTRIBUTION, INC.
    • Mitchell I. Kieffer
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Application

    TELESCOPING LADDER WITH A CASCADING COLLAPSE MECHANISM
    • Publication number 20190055783
    • Publication date Feb 21, 2019
    • CORE DISTRIBUTION, INC.
    • Mitchell I. Kieffer
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Application

    EXTENDABLE / RETRACTABLE LADDER
    • Publication number 20190003254
    • Publication date Jan 3, 2019
    • CORE DISTRIBUTION, INC.
    • Mitchell I. Kieffer
    • Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Information Patent Application

    EXTENDABLE / RETRACTABLE LADDER
    • Publication number 20180010388
    • Publication date Jan 11, 2018
    • CORE DISTRIBUTION, INC.
    • Mitchell I. Kieffer
    • Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Information Patent Application

    FOLDABLE LADDER
    • Publication number 20170145745
    • Publication date May 25, 2017
    • CORE DISTRIBUTION, INC.
    • Mitchell I. Kieffer
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Application

    FOLDABLE LADDER
    • Publication number 20160153231
    • Publication date Jun 2, 2016
    • CORE DISTRIBUTION, INC.
    • Mitchell I. Kieffer
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Application

    TELESCOPING LADDER WITH STABILIZERS
    • Publication number 20160153232
    • Publication date Jun 2, 2016
    • CORE DISTRIBUTION, INC.
    • Mitchell I. Kieffer
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Application

    EXTENDABLE / RETRACTABLE LADDER
    • Publication number 20120267197
    • Publication date Oct 25, 2012
    • CORE DISTRIBUTION, INC.
    • Mitchell I. Kieffer
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Application

    EXTENDABLE / RETRACTABLE LADDER
    • Publication number 20100044155
    • Publication date Feb 25, 2010
    • CORE DISTRIBUTION, INC.
    • Mitchell I. Kieffer
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Application

    ERGONOMIC EXTENDABLE/RETRACTABLE LADDER
    • Publication number 20080000723
    • Publication date Jan 3, 2008
    • Mitchell I. Kieffer
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Application

    Extending ladder and associated manufacturing methods
    • Publication number 20050139424
    • Publication date Jun 30, 2005
    • Core Distribution, Inc.
    • Mitchell I. Kieffer
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Application

    Extending ladder and associated manufacturing methods
    • Publication number 20040144596
    • Publication date Jul 29, 2004
    • Mitchell I. Kieffer
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Application

    Extending ladder and associated manufacturing methods
    • Publication number 20040020718
    • Publication date Feb 5, 2004
    • Mitchell I. Kieffer
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS