Patents by Inventor Rainer Kral

Rainer Kral 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).

  • Copying apparatus
    Patent number: 4171781
    Abstract: A copying apparatus with a paper roll wound on a sleeve, a pair of roll holders having lugs frictionally held in the ends of the sleeve, each roll holder being provided with a journal pin adapted to engage an associated guide mounted on the copying apparatus.
    Type: Grant
    Filed: March 20, 1978
    Date of Patent: October 23, 1979
    Assignee: Develop KG Dr. Eisbein & Co.
    Inventors: Rainer Kral, Kurt Moser, Heinrich Kaufmann