Patents by Inventor Richard D. Helle

Richard D. Helle 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).

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    Patent number: 5342697
    Abstract: An article and method of making it of powdered metal, the article being in the nature of a bushing having a main body portion of usual density and outer protrusions of lesser density for a squeezed interference fit in the part to which the article is to be combined.
    Type: Grant
    Filed: September 20, 1993
    Date of Patent: August 30, 1994
    Inventor: Richard D. Helle