Patents by Inventor Hoon Chang

Hoon Chang 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: 20080260850
    Abstract: Delivery system for bioactive agents on the basis of a polymeric drug carrier formed from compositions comprising an amphiphilic block copolymer of a hydrophilic block and a hydrophobic block having a terminal hydroxyl group substituted with a tocopherol or cholesterol group, and a polylactic acide derivative wherein one end of the polylactic acid is covalently bound to at least one carboxyl group. The carboxyl group of the polylactic acid derivative may be fixed with a di- or trivalent metal ion, which is obtained by adding the di- or trivalent metal ion to the polymeric composition.
    Type: Application
    Filed: May 6, 2005
    Publication date: October 23, 2008
    Applicant: SAMYANG CORPORATION
    Inventors: Yil-Woong Yi, Sa-Won Lee, Jeong-Il Yu, Dong-Hoon Chang, Min-Hyo Seo, Hye-Won Kang, Jae-Hong Kim
  • Patent number: 7438662
    Abstract: A six-speed power train of an automatic transmission for a vehicle includes: a first, double pinion planetary gear set including a first operational element always operating as an input element, a second operational element selectively operating as an output and a fixed element, and a third operational element selectively operating as an input element, an output element, and a fixed element; a second, Ravingneaux type planetary gear set including a first operational element selectively operating as an input element, a second operational element always operating as an output element, a third operational element selectively operating as an input element and a fixed element, and a fourth operational element selectively operating as a fixed element; a plurality of clutches disposed between and variably connecting operational elements of the first and second planetary gear sets; and a plurality of brakes variably connecting a transmission housing with one of the fixed elements.
    Type: Grant
    Filed: November 8, 2006
    Date of Patent: October 21, 2008
    Assignee: Hyundai Motor Company
    Inventors: Hoon Chang, Wook Jin Jang
  • Patent number: 7411566
    Abstract: A portable terminal has the dual display module structure in which a plurality of panels provided in the portable terminal are combined with clear conjunction to display a distortionless large screen display. The portable terminal includes a first display panel unit for displaying a first image, a second display panel unit for displaying a g the second display panel unit with the first display panel unit with supporting rotational shift, and a film connecting unit facing the hinge unit. A film is inserted in the connecting unit for connecting the first display panel unit with the second display panel unit electrically.
    Type: Grant
    Filed: February 6, 2006
    Date of Patent: August 12, 2008
    Assignee: Hana Micron
    Inventors: Young Hoon Chang, Woo Ki Song
  • Publication number: 20080152616
    Abstract: The present invention relates to an amphiphilic block copolymer of a hydrophilic block and a hydrophobic block with a terminal hydroxyl group wherein the terminal hydroxyl group of the hydrophobic bock is substituted with a tocopherol or cholesterol group. It also relates to polymeric compositions capable of forming stable micelles in an aqueous solution, comprising the amphiphilic block copolymer and a polylactic acid derivative wherein one or more ends of the polylactic acid are covalently bound to at least one carboxyl group.
    Type: Application
    Filed: October 10, 2007
    Publication date: June 26, 2008
    Inventors: Min Hyo Seo, Sa-Won Lee, Myung-Han Hyun, Jeong-Il Yu, Dong-Hoon Chang, Hye-Jeong Yoon, Jeong-Kyung Kim
  • Publication number: 20080103737
    Abstract: An online simulation system for a flexible AC transmission system (FACTS) which is capable of analyzing operation control effect of the FACTS in advance through an online data connection with a supervisory control and data acquisition (SCADA) system used for operating an electric power system.
    Type: Application
    Filed: September 7, 2007
    Publication date: May 1, 2008
    Inventors: Jong-Su YOON, Byung-Hoon Chang, Soo-Yeol Kim, Seung-Pil Moon, Jeong-Yuel Han
  • Patent number: 7349714
    Abstract: Disclosed is a method for handing-off a mobile station receiving packet data over a second channel from a first base station system (BSS) to a second BSS by a base station controller (BSC) in a system in which the mobile station communicates with the first BSS and the second BSS adjacent to the first BSS through a first channel for transmitting a control message, and the mobile station communicates with the first BSS through the second channel for transmitting the packet data. In the method, the mobile station measures receiving strengths of pilot channels transmitted from the first BSS and the second BSS, and transmits the measured receiving strengths to the BSC through the first BSS and the second BSS. The first and second BSSs each calculate available transmission power allocable to the second channel and transmits the calculated available transmission power to the BSC.
    Type: Grant
    Filed: August 17, 2004
    Date of Patent: March 25, 2008
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Sung-Won Lee, Soon-Young Yoon, Seung-Joo Maeng, Woo-June Kim, Hong-Seong Chang, Hoon Chang
  • Publication number: 20080015083
    Abstract: A six-speed power train of an automatic transmission for a vehicle includes: a first, double pinion planetary gear set including a first operational element always operating as an input element, a second operational element selectively operating as an output and a fixed element, and a third operational element selectively operating as an input element, an output element, and a fixed element; a second, Ravingneaux type planetary gear set including a first operational element selectively operating as an input element, a second operational element always operating as an output element, a third operational element selectively operating as an input element and a fixed element, and a fourth operational element selectively operating as a fixed element; a plurality of clutches disposed between and variably connecting operational elements of the first and second planetary gear sets; and a plurality of brakes variably connecting a transmission housing with one of the fixed elements.
    Type: Application
    Filed: November 8, 2006
    Publication date: January 17, 2008
    Inventors: Hoon Chang, Wook Jin Jang
  • Publication number: 20080002476
    Abstract: An electrically erasable programmable read-only memory (EEPROM) includes an access transistor having a floating gate and source/drain regions formed at opposite sides of the floating gate in a first well, a first well tap formed in the first well, a control gate located on a second region, first impurity regions formed at both sides of the control gate in the second region, and a second well tap formed in a third region.
    Type: Application
    Filed: March 6, 2007
    Publication date: January 3, 2008
    Inventors: Seung-Han Yoo, Hoon Chang
  • Publication number: 20070250217
    Abstract: A system and method for operating a Unified Power Flow Controller (UPFC) connected to a SCADA (Supervisory Control and Data Acquisition) are disclosed. The UPFC automatic operation system receives power system data from the SCADA system, automatically determines UPFC's optimum operation conditions according to power system states. The system includes: a UPFC acting as a serial/parallel FACTS to control variables of a power system; a SCADA for periodically acquiring line data of the power system and state data of the UPFC; and an upper controller for analyzing data received from the SCADA, and determining an UPFC's optimum operation mode for each power system condition and UPFC's optimum set-point control commands.
    Type: Application
    Filed: October 4, 2006
    Publication date: October 25, 2007
    Applicant: KOREA ELECTRIC POWER CORPORATION
    Inventors: Jong-Su YOON, Seung-Pil MOON, Won-Kyo LEE, Chang-Gon KIM, Jin-Boo CHOO, Young-Cheul CHOI, Young-Soo JEON, Byung-Hoon CHANG, Soo-Yeol KIM
  • Publication number: 20070202022
    Abstract: Disclosed is an annular distributor having: an annular slit layer that is mounted on an inner circumferential surface of the annular distributor and has at least one slit discharging or introducing a fluid; at least one opening that is formed on an outer circumferential surface of the annular distributor and is connected with any one of a fluid supply duct and a fluid discharge duct; and at least one guide vane selected from three types of guide vanes that are installed in the annular distributor, and splits a flow rate of the fluid supplied from the duct or collects a flow rate of the fluid discharged to the duct. And disclosed are a reactor or heat exchanger has the annular distributor, and a method of producing unsaturated aldehyde or unsaturated acid from olefin by catalytic gas phase oxidation in the reactor.
    Type: Application
    Filed: February 26, 2007
    Publication date: August 30, 2007
    Inventors: Sang Baek Shin, Sang Phil Han, Ye Hoon Im, Young Bae Kim, Jung Hoon Chang
  • Publication number: 20070187079
    Abstract: Disclosed is a shell-and-tube reactor or heat exchanger, which alternately comprises a doughnut-type baffle plate and a first disc-type baffle plate in order to increase heat transfer efficiency. In the reactor or heat exchanger, a second disc-type baffle plate is placed in an empty space inside of the doughnut-type baffle plate, and some tubes, through the inside of which a first object for heat transfer with a heat transfer medium, are present in a region inside of the doughnut-type baffle plate and outside of the second disc-type baffle plate. Also disclosed is a method for producing an oxide, comprising: using said reactor or heat exchanger, and causing a catalytic vapor-phase oxidation reaction in the tubes, through the inside of which the first object for heat transfer with the heat transfer medium is passed.
    Type: Application
    Filed: January 31, 2007
    Publication date: August 16, 2007
    Inventors: Sang Baek Shin, Sang Phil Han, Ye-Hoon Im, Young Bae Kim, Jung Hoon Chang, Sang Oeb Na, Won Am Lee
  • Publication number: 20070167647
    Abstract: Disclosed is a shell-and-tube reactor or heat exchanger comprising: first tubes, through the inside of which a first object for heat transfer with a heat transfer medium is passed, some of the first tubes being provided in a zone in which a flow of the heat transfer medium (parallel flow) parallel to the axis of the tubes is present; and a second tube, through the inside of which the first object is not passed, the second tube being provided in said zone such that it is parallel to the axis of the first tubes. Also disclosed is a method for producing an oxide, comprising using said shell-and-tube reactor or heat exchanger, and causing a catalytic vapor-phase oxidation reaction in first tubes, through the inside of which the first object for heat transfer with the heat transfer medium is passed.
    Type: Application
    Filed: January 18, 2007
    Publication date: July 19, 2007
    Inventors: Sang Baek Shin, Sang Phil Han, Ye Hoon Im, Young Bae Kim, Jung Hoon Chang, Sang Oeb Na, Won Am Lee
  • Publication number: 20070120152
    Abstract: A liquid crystal display device comprises: a first substrate and a second substrate facing and spaced apart from each other, the first substrate and the second substrate including an active area, a signal input area and a pad area, the signal input area and the pad area being disposed at a periphery of the active area; a gate line and a data line on the first substrate in the active area, the gate line and the data line crossing each other; first connection lines and second connection lines in the signal input area, the first connection lines extending to the pad area and crossing the second connection lines; a gate connection pattern contacting the first connection lines and the second connection lines; a common electrode on the second substrate; a shortage-preventing pattern on the common electrode and corresponding to the gate connection pattern; a seal pattern surrounding the active area, the seal pattern including a conductive ball; and a liquid crystal layer between the first and second substrates in th
    Type: Application
    Filed: June 15, 2006
    Publication date: May 31, 2007
    Inventors: Byung-Hoon Chang, Min-Jung Kim
  • Publication number: 20070085949
    Abstract: Disclosed is a transflective liquid crystal display having a high opening ratio and a single cell gap structure, which includes first and second substrates arranged opposite each other and respectively having reflective and transmissive regions; an opposite direction reflector disposed on the first substrate for reflecting introduced light to the transmissive regions; a color filter formed on the first substrate; transparent electrodes formed on the color filter; a lower polarization plate attached on the first substrate; common electrodes formed on the second substrate; an upper polarization plate attached on the second substrate; and a liquid crystal layer interposed between the first and second substrates, wherein the liquid crystal layer corresponding to the reflective region includes a fixing retardation area in which introduced light is always subjected to a constant phase difference.
    Type: Application
    Filed: March 3, 2006
    Publication date: April 19, 2007
    Inventors: Hoon Chang, Dong Suh, Young Park
  • Publication number: 20070078211
    Abstract: Disclosed is a resin composition for improving a whitening resistance in bending deformation. The flame retardant polypropylene-based resin composition with an improved whitening resistance in bending deformation according to the present invention includes a polypropylene-based resin, a polyolefin elastomer, a modified polyolefin elastomer grafted with polar groups and an inorganic flame retardant, wherein the polypropylene-based resin is included at a content of 5 to 50 % by weight of the total composition, wherein the polyolefin elastomer is included at a content of 0.1 to 50 % by weight of the total composition, wherein the modified polyolefin elastomer grafted with polar groups is included at a content of 0.1 to 30 % by weight of the total composition, and wherein the inorganic flame retardant is included at a content of 30 to 75 % by weight of the total composition.
    Type: Application
    Filed: September 22, 2006
    Publication date: April 5, 2007
    Inventors: Do-Hoon Chang, Sun-Hyuk Bae, June-Sun Kim, Gun-Joo Lee
  • Patent number: 7147893
    Abstract: A disc is produced using a method of and an apparatus for forming a transparent layer on a disc substrate. The method for forming the transparent layer on the disc substrate includes covering an axial hole formed at a center of the disc substrate with a cover element by inserting a protrusion of the cover element in the axial hole of the disc substrate so that a resin does not leak through the axial hole, dispensing the resin toward the center of the disc substrate from an upper side of the disc substrate, and removing the cover element. A more uniform transparent layer can be obtained throughout the disc substrate.
    Type: Grant
    Filed: August 14, 2002
    Date of Patent: December 12, 2006
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Do-hoon Chang, Myong-do Ro, Du-seop Yoon, Chang-min Park
  • Patent number: 7113671
    Abstract: An optical coupling device for coupling light to a core of an optical waveguide device. The optical coupling device is connected to the core of the optical waveguide device at a first end and convex at a second end opposite the first. The optical coupling device includes a waveguide connecting the first and second ends of the optical coupling device, for light transmission, and a cladding surrounding the waveguide.
    Type: Grant
    Filed: December 22, 2003
    Date of Patent: September 26, 2006
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Potapov Sergey, Ja-Nam Ku, Sung-Chul Kim, Il-Jong Song, Dong-Hoon Chang, Seong-Mo Hwang, Eung-Yeoul Yoon
  • Patent number: 7068681
    Abstract: An information frame of a new format transmitted according to a radio link protocol (RLP), and a device and method for transmitting and receiving the information frame in a mobile communication system. The information frame is comprised of a plurality of consecutive multiplex frames each having a given length. The multiplex frames each are comprised of a header and a succeeding RLP frame, and the RLP frame includes transmission data. At least one of the multiplex frames is comprised of a plurality of sub-multiplex frames, and each sub-multiplex frame is comprised of a header including an RLP service identifier field and a length indication field for indicating a length of the transmission data, and a data block associated to the succeeding RLP frame.
    Type: Grant
    Filed: August 15, 2003
    Date of Patent: June 27, 2006
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hoon Chang, Hyun-Seok Lee, Dae-Gyun Kim, Chang-Hoi Koo
  • Patent number: 7041333
    Abstract: A method of manufacturing an optical disc includes easily removing a bump formed on a circumference of the optical disc during forming a transparent layer by using a spin-coating method to form the optical disk having a high-density recording capacity. The method includes preparing a substrate having a diameter larger than that of a desired disc, applying an ultraviolet hardening resin to the substrate and forming a transparent layer having a predetermined thickness by a spin-coating method, illuminating an ultraviolet ray on the transparent layer and a bump formed on a circumference of the transparent layer to be hardened, and cutting out the bump by using a puncher. According to the method, the bump which inevitably occurs when the transparent layer is formed, can be easily cut out by a puncher.
    Type: Grant
    Filed: July 5, 2002
    Date of Patent: May 9, 2006
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Do-hoon Chang, Jin-hwan Kim, Myong-do Ro, Du-seop Yoon
  • Patent number: 7039029
    Abstract: A method for determining a gating rate in a base station for a CDMA communication system is disclosed. The method comprises transmitting information for assigning a dedicated control channel and a traffic channel to a mobile station, when a call is generated; after call setup, transmitting a message requesting mobile station's capability information to the mobile station; receiving the capability information including gating availability information of a reverse pilot signal and information about at least one gating rate, transmitted from the mobile station in reply to the request message; and determining a gating rate according to the capability information, transmitting information about the determined gating rate to the mobile station, and transitioning to an active sate. The mobile station's capability information includes information about gating availability and at least one gating rate, when gating is available.
    Type: Grant
    Filed: February 10, 2003
    Date of Patent: May 2, 2006
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyun-Seok Lee, Dae-Gyun Kim, Jae-Min Ahn, Chang-Hoi Koo, Hoon Chang