Patents by Inventor Karl-Heinz Otto

Karl-Heinz Otto 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).

  • Cap for a writing instrument
    Patent number: 3990801
    Abstract: A cap for a writing instrument includes sleeve means coaxially disposed within the cap body and formed from material softer than the material of the writing instrument body. The sleeve means has a non-deformable part and a deformable part arranged to substantially inhibit translational movement of the cap while attached to the writing instrument body. However, the cap may be angularly adjusted without scoring the writing instrument body.
    Type: Grant
    Filed: August 18, 1975
    Date of Patent: November 9, 1976
    Assignee: S.T. Dupont
    Inventor: Karl Heinz Otto Dietze