Patents by Inventor Manfred Eickhorst

Manfred Eickhorst 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).

  • Apparatus for the spectroscopical examination of light transmitting objects such as precious stones
    Patent number: 3989379
    Abstract: Apparatus for the spectroscopical examination of light transmitting objects such as gems comprising a spectroscope unit, receptacle means for the gem provided with a light transmitting support, and a light source, the gem in the receptacle being situated at the point of intersection of the optical axes of the spectroscope and of the light source, the latter comprising a first overhead light source shining light onto the stone from above and a second, transillumination light source shining light through the stone, the angles between the optical axes of the spectroscope and the light sources being adjustable. The light emerging from the light sources is produced by a cold light projector and conducted to the light sources via fibre optics.
    Type: Grant
    Filed: May 27, 1975
    Date of Patent: November 2, 1976
    Inventor: Manfred Eickhorst
  • Analysis lamp, particularly for the examination of precious stones
    Patent number: 3950102
    Abstract: An analysis lamp, particularly for the examination of precious stones, with at least one daylight source and at least one UV light source, the observation planes for the light emitted by the daylight source and by the UV source being spatially separated from one another.
    Type: Grant
    Filed: February 21, 1975
    Date of Patent: April 13, 1976
    Inventor: Manfred Eickhorst