Patents by Inventor Klaus Fraissl

Klaus Fraissl 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).

  • Beam splitters for endoscopes comprising a dual observation system
    Patent number: 4283115
    Abstract: This invention relates to beam splitters for use with endoscopes of the kind comprising a dual observation system whereby the image may optionally be adjusted for different proportions of the light intensity for the observer and the joint observer or a film or television camera by means of the optical system of the endoscope.According to the invention the beam splitter comprises two thin glass plates having a partial specular finish or partial reflection, at least one of said plates being shiftable to bring the partial specular finish in confrontation to an angled position in the beam path of the endoscope.
    Type: Grant
    Filed: July 5, 1979
    Date of Patent: August 11, 1981
    Assignee: Richard Wolf GmbH
    Inventor: Klaus Fraissl