Patents by Inventor Horst Hulsenbeck

Horst Hulsenbeck 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).

  • Writing tip for a ball point pen
    Patent number: 5104249
    Abstract: A writing tip for ball point pens include a receiving bore for a writing ball worked into the tip housing, a circumferential support surface inclined towards a central feed bore and arranged between same and with receiving bore, feed channels discharging into the central feed bore and into the support surface and spherically-shaped support zones adapted to the ball. Capillarity increasing intermediate surfaces respectively between the spherically-shaped support zones and the feed channels.
    Type: Grant
    Filed: January 26, 1990
    Date of Patent: April 14, 1992
    Assignee: J.S. Staedtler GmbH & Co.
    Inventors: Horst Elsner, Horst Hulsenbeck