Patents by Inventor Robert H. Hammerschlag

Robert H. Hammerschlag 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).

  • Aperture screen for the observation of bright objects with preservation of the resolution
    Patent number: 4390243
    Abstract: A screen for the reduction of light with preservation of the resolution comprising a plate with holes on distances equal or smaller than the light wavelength divided by the subtended angle of the object expressed in radians.
    Type: Grant
    Filed: October 17, 1980
    Date of Patent: June 28, 1983
    Inventor: Robert H. Hammerschlag