Patents by Inventor Howard Fineman

Howard Fineman 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).

  • Substance detector device
    Patent number: 4803470
    Abstract: The substance detection device comprises a transparent element and a light source for transmitting light through the transparent element onto a polished surface of the element. A pair of photodetectors are positioned for detecting intensity of light reflected from the polished surface and a circuit is provided for determining a difference in detected reflected light intensity on the photodetectors to determine a change in the critical angle of an optical interface at the polished surface.
    Type: Grant
    Filed: April 23, 1986
    Date of Patent: February 7, 1989
    Inventor: Howard Fineman