Patents by Inventor Hans Kirchmann

Hans Kirchmann 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).

  • Folding adjustable work stool
    Patent number: 4148523
    Abstract: The invention relates to a work stool used for a higher than normal seating position as required when working at a drafting table or the like. Features of the invention include a light weight frame that folds for storage, a wide base that does not interfere with the user's feet, and a vertically adjustable seat having a textured surface for ventilation.
    Type: Grant
    Filed: April 27, 1977
    Date of Patent: April 10, 1979
    Assignee: Heinrich Wilhelm Dreyer
    Inventors: Peter Brand, Guenther Haefner, Fritz Diedrich, Hans Kirchmann
  • Portable adjustable seat
    Patent number: D251098
    Type: Grant
    Filed: February 11, 1977
    Date of Patent: February 20, 1979
    Assignee: Firma Heinrich Wilhelm Dreyer
    Inventors: Fritz Diedrich, Hans Kirchmann