Patents by Inventor Hyung-Sik Cho

Hyung-Sik Cho 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: 20160016845
    Abstract: An embodiment of the present invention provides a cover glass which is slim and gives a better aesthetic feeling, and a method for manufacturing the same. The cover glass according to an embodiment of the present invention comprises: a glass substrate; a pattern portion formed on the glass substrate by etching; and a multi-layered thin film coated on the surface of the pattern portion.
    Type: Application
    Filed: November 29, 2013
    Publication date: January 21, 2016
    Inventors: Hyung Sik Cho, Yong Hyun Ji
  • Publication number: 20130300695
    Abstract: A matrix switching type pressure-sensitive touch detecting device has a simple configuration. The matrix switching type pressure-sensitive touch detecting device may include an upper substrate, a lower substrate, and a unified sensor module disposed between the upper substrate and the lower substrate.
    Type: Application
    Filed: May 9, 2013
    Publication date: November 14, 2013
    Applicant: CRUCIALTEC CO., LTD.
    Inventors: Hyung Sik CHO, Bo Eun KANG
  • Publication number: 20080160986
    Abstract: A method and device for mobile communication service using a dedicated frequency is disclosed. In one embodiment, the method for providing mobile communication service, in which a dedicated frequency conversion unit utilizes a dedicated frequency in a predetermined area may comprise i) receiving a signal of the dedicated frequency transmitted from the dedicated frequency base station, ii) corresponding a signal of common frequency to a signal of the received dedicated frequency, and iii) transmitting a signal of the corresponded common signal. In this embodiment, mobile communication terminals can receive a signal of the common frequency from the dedicated frequency conversion unit in the predetermined area and make a transition to a dedicated frequency bandwidth.
    Type: Application
    Filed: April 5, 2007
    Publication date: July 3, 2008
    Inventors: Young-Min Oh, Hyung-Sik Cho, Byoung-Jin Choi, Jun-Gu Choi
  • Patent number: 7327984
    Abstract: Disclosed is a device (200) and a method for measuring a receive sensitivity of a communication system having a transmit and receive path and a receive-only path, like a base station (100) employing space diversity by means of one transmit and receive antenna (111) and an additional receive antenna (121). A terminal (220) is connected to the transmit and receive path and to the receive-only path by means of a first (112) and a second coupler (122) and a first (213a) and a second transmitter (215a) whereby the input signals are combined by a combiner (211) to a single signal fed to the terminal (220).
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: February 5, 2008
    Assignee: KTFREETEL Co., Ltd.
    Inventors: Young-Min Oh, Ki-Taek Jang, Hyung-Sik Cho, Hyung-Sup Shin
  • Publication number: 20050272377
    Abstract: Disclosed is a device (200) and a method for measuring a receive sensitivity of a communication system having a transmit and receive path and a receive-only path, like a base station (100) employing space diversity by means of one transmit and receive antenna (111) and an additional receive antenna (121). A terminal (220) is connected to the transmit and receive path and to the receive-only path by means of a first (112) and a second coupler (122) and a first (213a) and a second transmitter (215a) whereby the input signals are combined by a combiner (211) to a single signal fed to the terminal (220).
    Type: Application
    Filed: March 12, 2004
    Publication date: December 8, 2005
    Inventors: Young-Min Oh, Ki-Taek Jang, Hyung-Sik Cho, Hyung-Sup Shin
  • Patent number: 6748194
    Abstract: Disclosed is a repeater system having an oscillation preventing function and an automatic reverse output disabling function, and a control method thereof, in which the reverse output of the repeater system is disabled upon detection of a non-subscriber interval in the service area or a reverse oscillation so as to prevent a drop in the capacity of a base station transceiver system and protect a reception path.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: June 8, 2004
    Assignee: Korea Telecom M.Com Co., Ltd.
    Inventors: Young-Min Oh, Byoung-Shik Kang, Hyung-Sik Cho, Wan Choi
  • Publication number: 20020119749
    Abstract: Disclosed is a repeater system having an oscillation preventing function and an automatic reverse output disabling function, and a control method thereof, in which the reverse output of the repeater system is disabled upon detection of a non-subscriber interval in the service area or a reverse oscillation so as to prevent a drop in the capacity of a base station transceiver system and protect a reception path.
    Type: Application
    Filed: February 28, 2001
    Publication date: August 29, 2002
    Inventors: Young-Min Oh, Byoung-Shik Kang, Hyung-Sik Cho, Wan Choi
  • Patent number: 5812941
    Abstract: A circuit for measuring output powers of channels and stabilizing RF output in a system using a linear power amplifier, includes a channel portion in which each of channels is made up with an RF control board and frequency increasing board; a base station output portion for combining and outputting the respective channel signals via an antenna; and an output stabilizing portion for mixing the RF output signal of the base station output portion with a selected second local signal among the second local signals by the frequency increasing boards to make a low intermediate frequency, filtering it, and converting it into a direct current, and comparing the current with the output of a base station so as to control a selection channel frequency of channel portion and stabilize the output, whereby the variation of output power possibly occurring by an RF stage and the output power of the base station are stabilized.
    Type: Grant
    Filed: December 5, 1996
    Date of Patent: September 22, 1998
    Assignee: Hyundai Electronics Industries Co., Ltd.
    Inventor: Hyung Sik Cho