Patents by Inventor Christopher R. Welch

Christopher R. Welch 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).

  • Aircraft landing site indication and light
    Patent number: 5559510
    Abstract: A light unit has a strobe operated flash tube and a non-strobe peripheral lamp immediately beneath the flash tube; a switch can turn the unit off, operate either light or enable the pilot of an aircraft to signal the light unit to operate the flash tube or to turn off the flash tube and operate the non-strobe peripheral lamp, by means of a radio receiver having a local oscillator midway between two standard distress frequencies. The light unit may have infrared or other color lenses. A ribbon assists establishing a pattern of light and/or colors to mark a landing site and indicate wind direction.
    Type: Grant
    Filed: April 12, 1995
    Date of Patent: September 24, 1996
    Assignee: Northrop Grumman Corporation
    Inventors: Maurice L. Strong, III, Charles J. Tranchita, Christopher R. Welch, Gerald Griffith