Patents by Inventor David J. Chadwick

David J. Chadwick 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).

  • Publication number: 20190336457
    Abstract: A topical composition including cannabidiol (CBD) and Aloe Vera in the form of nanoencapsulations with an average size of between about 50 nm to about 500 nm. Methods of using the topical composition for treating skin conditions of a subject are also disclosed.
    Type: Application
    Filed: April 18, 2019
    Publication date: November 7, 2019
    Inventors: David J. Chadwick, Daniel D. Holsworth
  • Patent number: 5442646
    Abstract: A communication system (100) is provided for transmitting data to mobile receivers utilizing a subcarrier within a commercial FM channel of a radio station (55). The data transmitted is first encoded in encoder (112), utilizing a forward error correction code. The sequence of the encoded data is altered in interleaver (116), subdivided into a plurality of subframes, in framing and synchronization circuit (120), which also adds channel state bits to each subframe. The framed data is modulated onto the subcarrier in the differential quadrature phased shift keying modulator (130), the output of which is coupled to the FM modulator (52) of radio station transmitter (50). The transmitted radio frequency signals may be received by a vehicle antenna (12) for coupling to the vehicle's FM receiver (80). The modulated subcarrier is recovered from the FM demodulator (84) of the receiver (80), the modulated subcarrier being demodulated to recover the encoded digital data therefrom.
    Type: Grant
    Filed: February 1, 1994
    Date of Patent: August 15, 1995
    Assignee: The Mitre Corporation
    Inventors: David J. Chadwick, Howard H. Ma, Frank J. Mammano, James W. Marshall, Vijaykumar M. Patel, Lyle G. Saxton