Patents by Inventor Paul-Joachim Mader

Paul-Joachim Mader 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: 5397018
    Abstract: A tennis ball handling system in which a first storage container (1) for many tennis balls (2) is filled at the tennis ball producer with new tennis balls suitable for play, is transported to an installation site, such as a sporting goods store, tennis facility, etc. and installed at the installation site, a second storage container for many tennis balls is filled at the installation site with used tennis balls that are no longer suitable for play and in which the used balls are transported back to the tennis ball producer or to a recycling operation and emptied there, and reusable player's storage containers that can be bought, rented, borrowed in a deposit system or acquired at no cost by the player, are filled with a small number of new tennis balls (2) that are removed from the first storage container (1) for use by the tennis player, and from which used tennis balls (2) that are no longer suitable for play are emptied by the player into the second storage container at the installation site.
    Type: Grant
    Filed: June 9, 1993
    Date of Patent: March 14, 1995
    Inventor: Paul-Joachim Mader