Patents by Inventor Ian D. Fox

Ian D. Fox 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).

  • Patent number: 5268788
    Abstract: A display especially for viewing by a night-vision aid has an array of LED's which emit green light. A dichroic filter is located in front of the display and transmits radiation at the peak emission of the diodes but reflects radiation in the range to which the night-vision aid is sensitive. A bandpass filter located in front of the dichroic filter prevents transmission of longer wavelengths, and a circularly polarizing filter in front of the bandpass filter prevents transmission of radiation reflected specularly from surfaces behind it.
    Type: Grant
    Filed: June 12, 1992
    Date of Patent: December 7, 1993
    Assignee: Smiths Industries Public Limited Company
    Inventors: Ian D. Fox, John E. Lee