Patents by Inventor Wolf Zeitlin

Wolf Zeitlin 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).

  • Patent number: 4407521
    Abstract: A foldable hand cart formed with a platform in front and frames extended to form a high back. The cart is collapsible to form a compact assembly bound together by an elastic cord. The platform is automatically locked when unfolded, as are the frames when raised in consecutive order. Simple controls serve to unlock the frames and platform for movements collapsing the cart. Interfitting safeguards reinforce the frames against separating, pivoting and twisting strains.
    Type: Grant
    Filed: November 24, 1980
    Date of Patent: October 4, 1983
    Inventor: Wolf Zeitlin