Patents by Inventor Reiner Eisen

Reiner Eisen 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: 6732437
    Abstract: A sharpener for pencils with a soft lead with a sharpener housing has a conical sharpener channel, a sharpening knife which is fastened at the fastener housing and which is set tangentially to the sharpener channel. A shape-cutting knife, which can be swiveled into the sharpener channel, is provided with a manually actuated lever and with an arc-shaped, curved cutting edge for the selective shaping of the front end section of the lead. The sharpener is constructed as a double sharpener with individual sharpeners for pencils of different diameters placed opposite to one another in a common housing and the shape-cutting knives can be swiveled alternatively upward against the lead in the respective individual sharpener about a common axis, which is disposed at the common front end of the sharpener channels which are open in the upward and downward directions in this region.
    Type: Grant
    Filed: May 31, 2002
    Date of Patent: May 11, 2004
    Assignee: Eisen GmbH
    Inventors: Johann Eisen, Reiner Eisen
  • Publication number: 20030163925
    Abstract: A sharpener for pencils with a soft lead with a sharpener housing has a conical sharpener channel, a sharpening knife which is fastened at the fastener housing and which is set tangentially to the sharpener channel. A shape-cutting knife, which can be swiveled into the sharpener channel, is provided with a manually actuated lever and with an arc-shaped, curved cutting edge for the selective shaping of the front end section of the lead. The sharpener is constructed as a double sharpener with individual sharpeners for pencils of different diameters placed opposite to one another in a common housing and the shape-cutting knives can be swiveled alternatively upward against the lead in the respective individual sharpener about a common axis, which is disposed at the common front end of the sharpener channels which are open in the upward and downward directions in this region.
    Type: Application
    Filed: May 31, 2002
    Publication date: September 4, 2003
    Inventors: Johann Eisen, Reiner Eisen