Patents by Inventor Ronald J. Verhaagen

Ronald J. Verhaagen 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).

  • Image rotation system
    Patent number: 4710004
    Abstract: A device for supporting a dove prism is provided which permits the dove prism to slide axially and maintain contact with a projection lens assembly in a microfilm projection device. The prism holder is rotatable to permit rotation of the images and the dove prism floats within the prism holder to maintain contact upon focussing of a lens or to maintain contact with various lens barrel assemblies placed in the photographic system.
    Type: Grant
    Filed: February 25, 1987
    Date of Patent: December 1, 1987
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Ronald J. Verhaagen