Patents by Inventor Wolfgang Winkler

Wolfgang Winkler 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: 4230655
    Abstract: A pencil, in particular for cosmetic purposes, is made by casting a stick composition into a tubular body, which forms the shaft of the pencil and is preferably seamless, in such a way that a ready-to-use exposed stick point is formed during casting.The shaft may be of wood or plastics. In the case of a wooden shaft, a solid wooden rod of twice the shaft length may be bored out and otherwise worked and then separated along a central plane transverse to the axis of the rod to form a pair of shafts into which the stick composition can subsequently be cast.
    Type: Grant
    Filed: December 22, 1977
    Date of Patent: October 28, 1980
    Assignee: Messrs. Schwan-Stabilo Schwanhausser GmbH & Co.
    Inventors: Peter Kruckel, Wolfgang Winkler