Patents by Inventor Kyung H. No

Kyung H. No 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).

  • Automatic power breaking circuits for communication equipments
    Patent number: 5233645
    Abstract: An automatic power breaking circuit for a communication equipment, for breaking automatically electric power in the communication equipment when the communication equipment does not perform transmission and reception for talk. The present circuit comprises a call processing tone detector 1 connected to a receiving stage of the communication equipment, for detecting a plurality of predetermined tones provided from a switch board of an exchange, a JK flip-flop 2 connected to said call processing tone detector 1, for receiving a source voltage, a talk terminal 4 for receiving said source voltage and being manually switched to an ON state by the user when transmission or reception is required, a D flip-flop 6 connected to said talk terminal 4, an AND gate 7 connected to output terminals of said JK flip-flop 2 and D flip-flop 6, and a transistor 8 connected to an output terminal of said AND gate 7w for switching power being supplied to a transmitting stage of the communication equipment.
    Type: Grant
    Filed: October 22, 1991
    Date of Patent: August 3, 1993
    Assignees: Electronics and Telecommunications Research Institute, Korea Telecommunication Authority
    Inventors: Gak J. Choi, Ho Y. Kim, Young I. Kim, Kyung H. No, Ki H. Kim