Patents by Inventor Chang-Nam Yu

Chang-Nam Yu 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).

  • Digital wireless intercom system and driving method thereof
    Patent number: 9191478
    Abstract: The present invention provides a digital wireless intercom system including: at least one master base station; at least one remote base station connected to the at least one master base station wiredly through at least one of a local area network, a local area network infrastructure and an internet, the at least one remote base station transmitting and receiving a synchronization signal and a data signal of digital type with the at least one master base station; a plurality of first belt packs within a transmission radius of the at least one master base station, the plurality of first belt packs transmitting and receiving the synchronization signal and the data signal with the at least one master base station wirelessly; and a plurality of second belt packs within a transmission radius of the at least one remote base station, the plurality of second belt packs transmitting and receiving the synchronization signal and the data signal with the at least one remote base station wirelessly, wherein the at least on
    Type: Grant
    Filed: August 18, 2011
    Date of Patent: November 17, 2015
    Assignee: LAON TECHNOLOGY CO., LTD.
    Inventor: Chang-Nam Yu
  • DIGITAL WIRELESS INTERCOM SYSTEM AND DRIVING METHOD THEREOF
    Publication number: 20130272275
    Abstract: The present invention provides a digital wireless intercom system including: at least one master base station; at least one remote base station connected to the at least one master base station wiredly through at least one of a local area network, a local area network infrastructure and an internet, the at least one remote base station transmitting and receiving a synchronization signal and a data signal of digital type with the at least one master base station; a plurality of first belt packs within a transmission radius of the at least one master base station, the plurality of first belt packs transmitting and receiving the synchronization signal and the data signal with the at least one master base station wirelessly; and a plurality of second belt packs within a transmission radius of the at least one remote base station, the plurality of second belt packs transmitting and receiving the synchronization signal and the data signal with the at least one remote base station wirelessly, wherein the at least on
    Type: Application
    Filed: August 18, 2011
    Publication date: October 17, 2013
    Applicant: LAON TECHNOLOGY CO., LTD.
    Inventor: Chang-Nam Yu