Patents Assigned to Heinrich Wilhelm Dreyer
  • 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