Patents by Inventor Herbert S. Riddle, Jr.

Herbert S. Riddle, Jr. 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: 4389636
    Abstract: A non-binary digital encoding/decoding process wherein the serial bits to be transferred are encoded into a stream of complementary-bit-pairs, a predetermined bit of each pair corresponding to an original information bit, and the other bit of the pair being the complement of that bit. This stream of encoded complementary-bit-pairs is transferred, as by a communication or information-storage medium, to a decoder where the encoded stream is fed to and along a shift register. The bit-pairs in the decoder register are continuously examined for complementary relationship as the encoded stream is shifted along the register. The resulting signal generated in the decoder enables transferral of only error-free serial information out of the register, due to the error-detection properties inherent to the encoding/decoding process.
    Type: Grant
    Filed: November 3, 1980
    Date of Patent: June 21, 1983
    Inventor: Herbert S. Riddle, Jr.
  • Patent number: 4291343
    Abstract: An apparatus for producing a signal which varies as the ratio of the frequency of a first stream to a second stream. In a preferred embodiment of the apparatus, the first stream is transformed into a first signal of value proportional to the frequency of the first stream, and the second stream is transformed into a second signal that has a value proportional to the product of the second stream frequency times a feedback value. The feedback value is derived from a combination of the first and second signals.
    Type: Grant
    Filed: March 5, 1979
    Date of Patent: September 22, 1981
    Inventor: Herbert S. Riddle, Jr.
  • Patent number: 4148078
    Abstract: Apparatus and method for reducing flutter noise in a frequency-modulated data stream, wherein the data stream is combined with a reference stream which has been modified by the fed-back result of the combination. Before combination, the data stream is transformed into a first rectangular-pulse stream in which amplitude is constant and frequency is dependent on the frequency of modulation of the data stream, whereas the reference stream is transformed into a second rectangular pulse stream of amplitude which is dependent on the fed-back result of the combination of the streams, and the frequency is dependent on the frequency of modulation of the reference stream.
    Type: Grant
    Filed: August 29, 1977
    Date of Patent: April 3, 1979
    Inventor: Herbert S. Riddle, Jr.