Patents by Inventor Ralph P. Miller

Ralph P. Miller 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).

  • Wireless multi-head smoke detector system
    Patent number: 4160246
    Abstract: A wireless smoke detector apparatus including at least one detector/transmitter unit and a receiver/annunciator unit. The detector/transmitter having a pulsed infrared radiation source, a photodetector having an optical axis angularly intersecting the axis of the radiation source for detecting radiation scattered by smoke particles and a transmitter responsive to the output of the detector for transmitting a unique receiver/annunciator actuating signal which is distinguishable by the receiver/annunciator from other actuating signals.
    Type: Grant
    Filed: October 3, 1977
    Date of Patent: July 3, 1979
    Assignee: Fairchild Camera and Instrument Corp.
    Inventors: Stephen M. Martin, Ralph P. Miller