Patents by Inventor John W. von Holdt, deceased

John W. von Holdt, deceased 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).

  • Apparatus for molding a one-piece article in a single molding operation using two different plastic materials
    Patent number: 6106261
    Abstract: A method and apparatus for molding a one-piece article in a single molding operation using two different plastic materials so a first portion of the article is made of one plastic material and a second portion of the article is made of a different plastic material, and the two portions are fused together while hot to create a one-piece article.
    Type: Grant
    Filed: August 31, 1998
    Date of Patent: August 22, 2000
    Assignee: John W. von Holdt
    Inventor: John W. von Holdt, deceased