Patents by Inventor Robert D. Castleman

Robert D. Castleman 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).

  • Electronic infrared detector
    Patent number: 4945244
    Abstract: An infrared sensing device is capable of sensing the amount of infrared radiation which is present at a given location and presenting a visual indicia of the strength of the signal. A series of led's which light up in a bar graph fashion indicate the strength of the signal. The device also has a remote sensor which allows the sensing to be done at a location away from the position of the visual signal strength indicator.
    Type: Grant
    Filed: December 23, 1988
    Date of Patent: July 31, 1990
    Inventor: Robert D. Castleman