Patents by Inventor Conrad E. Dupke

Conrad E. Dupke 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: 4604920
    Abstract: A band or ring, split at one point in its circumference, forming end portions directed toward each other. A pair of handles are welded to the band, at the end portions, each at points distributed over substantial length of the band. The band is of work hardened steel, and knurled on its inner surface. The steel band is self-biased to an outer or enlarged size, and contractible to an inner or smaller size by squeezing on the handles, for gripping an object.
    Type: Grant
    Filed: June 11, 1985
    Date of Patent: August 12, 1986
    Inventor: Conrad E. Dupke