Patents by Inventor Hans-Jurgen Rahn

Hans-Jurgen Rahn 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).

  • Mechanically erasable printing liquid
    Patent number: 4596846
    Abstract: A printing ink for capillary or jet printers adapted to form a mechanically erasable image, comprises a latex-based aqueous polymer dispersion including a water-soluble or organic-solvent soluble dyestuff coloring the particles of the dispersion without the use of additional solvent.
    Type: Grant
    Filed: August 16, 1983
    Date of Patent: June 24, 1986
    Assignee: Pelikan Aktiengesellschaft
    Inventors: Karl-Heinz Bohne, Hans-Jurgen Rahn