Patents by Inventor Donald E. Karhoff

Donald E. Karhoff 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).

  • Rolled Compression Fitting
    Publication number: 20080136175
    Abstract: A compression sleeve comprises a rolled blank having opposing ends coupled together to form a tubular body. A method of forming a compression sleeve comprises forming a blank having opposing ends. At least one notch with at least one relief portion is formed in the blank. The blank is rolled to form a tubular configuration, and the opposing ends are coupled to maintain the tubular configuration.
    Type: Application
    Filed: October 20, 2006
    Publication date: June 12, 2008
    Applicant: BLD PRODUCTS, LTD
    Inventors: Robert C. Hansen, Donald E. Karhoff