Patents by Inventor Claudia Kraska

Claudia Kraska 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).

  • Process for the production of a pencil stick, a stick produced by the process and a pencil having such a stick
    Patent number: 5340226
    Abstract: In a process for the production of a pencil stick, a pencil stick produced by the process and a pencil having such a stick, a stick material is introduced into a thin-wall tube portion forming a mold, from one end thereof, the tube portion comprising a sharpenable plastic material.
    Type: Grant
    Filed: May 21, 1993
    Date of Patent: August 23, 1994
    Assignee: Schwan-Stabilo Schwanhausser GmbH & Co.
    Inventors: Ulrich Griebel, Claudia Kraska, Peter Schielein