Patents by Inventor Josef Grassmann

Josef Grassmann 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: 4292641
    Abstract: An electrically heated recording indicator is designed for use in a recording instrument or the like utilizing a thermosensitive recording medium. The recording indicator comprises an outer electrically conductive metallic tubular support member and an inner electrically insulating non-metallic tubular member positioned in the outer tubular support member. The outer tubular support member has an aperture adjacent one end thereof and the inner tubular member is arranged to extend across the aperture. Electrical resistance heating means is located within the inner tubular member. The heated inner tubular member directly contacts the thermosensitive recording medium through the aperture in the outer tubular support member to write on the thermosensitive recording medium.
    Type: Grant
    Filed: March 24, 1980
    Date of Patent: September 29, 1981
    Inventor: Josef Grassmann