Patents by Inventor Christian Birkenstock

Christian Birkenstock 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).

  • Publication number: 20210345825
    Abstract: A system for presenting and preparing foodstuffs that include a plurality of individual foodstuff blocks provided formed into basic shapes comprises a heating device including a heatable cooking receptacle for one or more foodstuff blocks with a heatable grill surface and at least one heating mandrel projecting from the grill surface; wherein the heating mandrel is insertable into a passage opening provided in each respective foodstuff block and is adapted to the contour of the passage opening so as to avoid an air gap between the wall of the passage opening and the heating mandrel.
    Type: Application
    Filed: September 23, 2019
    Publication date: November 11, 2021
    Inventor: Christian Birkenstock
  • Patent number: 6681502
    Abstract: A sandal with a shoe bottom with raised sole rims on either side of the shoe bottom, a foot support bed incorporated in the shoe bottom, an upper strapping material, and a cover sole connected to the shoe bottom and having raised edge regions aligned with and extending past the raised sole rims on either side of the shoe bottom. The raised edge regions each form a lateral fastening portion for attachment to the upper strapping material.
    Type: Grant
    Filed: September 15, 2000
    Date of Patent: January 27, 2004
    Inventor: Christian Birkenstock
  • Patent number: 5896626
    Abstract: A clasp for fastening together opposing distal portions of upper and lower segments of flexible material, such as the straps of a shoe or sandal. The clasp has an upper part pivotally connected to a lower part by a hinge structure comprised of portions of proximate sidewalls of the parts, and a clip structure comprising an outwardly facing recess in a distal sidewall of one of the parts and a resilient inwardly arched section of a distal sidewall of the other part arranged to snap into and engage the recess when positioned opposite thereto. This snap action secures the upper part to the lower part in a closed position of the clasp. The lower part includes a holding pin mounted on a bottom wall of the lower part for insertion through corresponding holes in the flexible segments to prevent relative movement between these segments when the clasp is closed.
    Type: Grant
    Filed: August 28, 1997
    Date of Patent: April 27, 1999
    Assignee: Betula Schuh GmbH
    Inventor: Christian Birkenstock
  • Patent number: D513838
    Type: Grant
    Filed: February 24, 2004
    Date of Patent: January 31, 2006
    Inventor: Christian Birkenstock
  • Patent number: D514779
    Type: Grant
    Filed: April 14, 2005
    Date of Patent: February 14, 2006
    Inventor: Christian Birkenstock
  • Patent number: D452770
    Type: Grant
    Filed: March 14, 2001
    Date of Patent: January 8, 2002
    Assignee: Betula Schuh GmbH
    Inventor: Christian Birkenstock
  • Patent number: D453611
    Type: Grant
    Filed: March 14, 2001
    Date of Patent: February 19, 2002
    Assignee: Betula Schuh GmbH
    Inventor: Christian Birkenstock
  • Patent number: D532586
    Type: Grant
    Filed: July 5, 2005
    Date of Patent: November 28, 2006
    Inventor: Christian Birkenstock
  • Patent number: D407538
    Type: Grant
    Filed: August 26, 1997
    Date of Patent: April 6, 1999
    Assignee: Betula Schuh GmbH
    Inventor: Christian Birkenstock
  • Patent number: D408971
    Type: Grant
    Filed: August 26, 1997
    Date of Patent: May 4, 1999
    Assignee: Betula Schuh GmbH
    Inventor: Christian Birkenstock
  • Patent number: D410323
    Type: Grant
    Filed: August 26, 1997
    Date of Patent: June 1, 1999
    Assignee: Betula Schuh GmbH
    Inventor: Christian Birkenstock
  • Patent number: D413010
    Type: Grant
    Filed: August 26, 1997
    Date of Patent: August 24, 1999
    Assignee: Betula Schuh GmbH
    Inventor: Christian Birkenstock
  • Patent number: D420208
    Type: Grant
    Filed: September 18, 1998
    Date of Patent: February 8, 2000
    Assignee: Betula Schuh GmbH
    Inventor: Christian Birkenstock
  • Patent number: D431346
    Type: Grant
    Filed: April 6, 1999
    Date of Patent: October 3, 2000
    Assignee: Betulah Shuh GmbH
    Inventor: Christian Birkenstock