Patents by Inventor Margaret Antkowiak

Margaret Antkowiak has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Latches for gates and doors
    Publication number: 20070175249
    Abstract: A latch has a displaceable latching element in a housing for engagement with a separate striker arm to be latched behind an engagement shoulder of the latching element. The housing mounts a cylinder lock to receive a key from the front: A rotor is mounted on the rear of cylinder lock and rotation of the key rotation the rotor to drive a locking element to engage and lock the latching element. The rotor may also be axial displaceable against spring biasing responsive to a rear unit pushing element whereby unlocking from a rear cylinder lock may rotate the rotor to unlock and pushing causes the latching element to be displaced against its biasing to release the striker arm.
    Type: Application
    Filed: January 30, 2007
    Publication date: August 2, 2007
    Inventors: Irek Karcz, Anthony John Clark, Margaret Antkowiak
  • Latch for doors and gates
    Patent number: D525515
    Type: Grant
    Filed: August 20, 2004
    Date of Patent: July 25, 2006
    Assignee: D&D Group Pty Ltd
    Inventors: Margaret Antkowiak, Irek Karcz
  • Latch for gates
    Patent number: D525855
    Type: Grant
    Filed: August 23, 2004
    Date of Patent: August 1, 2006
    Assignee: D&D Group Pty Ltd
    Inventors: Margaret Antkowiak, Irek Karcz
  • Latch for gates and doors
    Patent number: D527608
    Type: Grant
    Filed: August 20, 2004
    Date of Patent: September 5, 2006
    Assignee: D & D Group Pty Ltd
    Inventors: Margaret Antkowiak, Irek Karcz
  • Side bar unit for a gate latch assembly
    Patent number: D563201
    Type: Grant
    Filed: September 20, 2007
    Date of Patent: March 4, 2008
    Assignee: D & D Group Pty Ltd.
    Inventors: Margaret Antkowiak, Irek Karcz
  • Push button rear activating unit for a gate latch assembly
    Patent number: D563767
    Type: Grant
    Filed: September 27, 2007
    Date of Patent: March 11, 2008
    Assignee: D & D Group Pty Ltd.
    Inventors: Margaret Antkowiak, Irek Karcz