Patents by Inventor T. Chung

T. Chung 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: 6813502
    Abstract: A wireless communication apparatus capable of providing information requests includes a wireless communication device having a wireless transceiver configured to send and receive communications across a wireless communication network. A hands-free unit can be included and coupled to the wireless communication device. The hands-free unit includes a speaker and a microphone configured to provide audio information to a user and to accept audio information from the user. A position determination system determines a location of the apparatus and provides position data indicative of such location to a server along with the information request. The server can process the information request along with the position information and provide a response to the request to the wireless communication apparatus.
    Type: Grant
    Filed: January 2, 2001
    Date of Patent: November 2, 2004
    Assignee: Leap Wireless International, Inc.
    Inventors: William Y. Son, Jong T. Chung
  • Publication number: 20040079306
    Abstract: A variable lift electromechanical valve actuator for use with an internal combustion engine. The electromechanical valve includes a first electromagnet, a second electromagnet, and a hydraulic lifting mechanism. The upper electromagnet is fixedly mounted to a housing while the lower electromagnet slides in conjunction with the hydraulic lifting mechanism. Multiple valve lifts are provided for by the movement of the lower electromagnetic electromagnet. Variable valve lift allows for more efficient operation of the engine and reduced power consumption, noise, vibration, and wear concerns.
    Type: Application
    Filed: October 23, 2002
    Publication date: April 29, 2004
    Inventors: John D. Norton, James Alexander, Ha T. Chung
  • Patent number: 6682251
    Abstract: A system for carrying an apparatus, such as a monitor, includes a pedestal having a base with a circumferential edge, and a peripheral device to be coupled to the pedestal. The base further includes a coupler for coupling the peripheral device thereto. The coupler is arranged to couple the peripheral device to the circumferential edge at any position thereof. This provides for flexibility and freedom of practical use when the set-up and arrangement of the system are altered, such that no substantial force has to be applied for lifting and rotating the pedestal carrying an apparatus, such as a monitor.
    Type: Grant
    Filed: November 9, 2000
    Date of Patent: January 27, 2004
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Kai T. Chung
  • Patent number: 6539494
    Abstract: A computer system for a web site uses three tiers of servers, web (or HTTP) servers, application servers, and backup servers. The backup servers are responsible for backing up the session data for particular application servers. The system assigns to each web session a session ID, which encodes the IP addresses of the application server and its backup server, and provides an identifier that uniquely identifies the session within that application server. A session is automatically routed to a second application server to process a request if the application server handling the session should fail or not have the requested application. However, the request uses the original session ID. The second application server detects from the session ID that the session may have been handled by the first application server. The second application server decodes the IP address for the backup server for the first application server, and connects to that backup server.
    Type: Grant
    Filed: June 17, 1999
    Date of Patent: March 25, 2003
    Assignee: Art Technology Group, Inc.
    Inventors: Nathan Abramson, Joseph T. Chung
  • Patent number: 6416916
    Abstract: A toner of toner particles containing at least one binder, at least one color ant, and an external additive package comprised of zinc stearate and at. least one of silicon dioxide or titanium dioxide, wherein the amount of zinc stearate is limited to about 0.10 percent by weight or less of the toner. It has been surprisingly found that when the amount of zinc stearate is so limited, a developer formed from the toner exhibits excellent triboelectric charging and stability and excellent developer flow. When the developer is used in a magnetic brush development system, consistent, high quality copy images are formed substantially without any depletion defects over time.
    Type: Grant
    Filed: September 25, 2000
    Date of Patent: July 9, 2002
    Assignee: Xerox Corporation
    Inventors: Scott M. Silence, Edward J. Gutman, James M. Proper, Frank O. Reitze, Brian S. Giannetto, Brian E. Moore, Joo T. Chung, James G. Stenzel, Jeffrey L. DeBarr, Morris M. DeYoung, Jr.
  • Patent number: 6406822
    Abstract: At least three differently colored toners, designed for use together in forming a color image in an image developing device, have substantially the same melt flow index value. By substantially matching the melt flow index values of at least three toners of a set of toners, it has been found that the resultant color image has an overall excellent image quality, i.e., an excellent overall gloss level without any gloss banding.
    Type: Grant
    Filed: September 29, 2000
    Date of Patent: June 18, 2002
    Assignee: Xerox Corporation
    Inventors: Scott M. Silence, Joo T. Chung, James M. Proper, Edward J. Gutman, James G. Stenzel, Kip L. Jugle, Yelena Shapiro, James A. Winters, Maria M. Barden, John S. Walters
  • Patent number: 6358657
    Abstract: A toner having a high colorant concentration and a binder resin that includes a polyester resin having linear portions and crosslinked portions of high density crosslinked microgel particles has a melt flow index value of about 11±MFI units. The binder resin may also include a mixture of two polyester resins having different MFI values.
    Type: Grant
    Filed: August 16, 2001
    Date of Patent: March 19, 2002
    Assignee: Xerox Corporation
    Inventors: Scott M. Silence, Joo T. Chung, James M. Proper, John J. Ianni, Jeffrey H. Sokol, Hui Chang
  • Publication number: 20010016500
    Abstract: A wireless communication apparatus capable of providing information requests includes a wireless communication device having a wireless transceiver configured to send and receive communications across a wireless communication network. A hands-free unit can be included and coupled to the wireless communication device. The hands-free unit includes a speaker and a microphone configured to provide audio information to a user and to accept audio information from the user. A position determination system determines a location of the apparatus and provides position data indicative of such location to a server along with the information request. The server can process the information request along with the position information and provide a response to the request to the wireless communication apparatus.
    Type: Application
    Filed: January 2, 2001
    Publication date: August 23, 2001
    Applicant: NeoPoint, Inc.
    Inventors: William Y. Son, Jong T. Chung
  • Patent number: 6278887
    Abstract: A wireless communication handset includes at least one processor and is configured to shutdown at least one of a display, display backlight and keypad backlight of the handset. A first timer is set when the display is turned on, and the first timer is started to time a display time-out period. If a keypad entry is made by a user during the timeout period, the first timer is reset. On the other hand, if a keypad entry is not made by the user before the time-out period expires, the display is shut off to conserve power. Likewise, a time-out period can be implemented to control automatic shut-off of other power-consuming features such as a display backlight and a keypad backlight. Features can be included to automatically re-enable shut-down features upon the occurrence of events such as the receipt of an incoming call, a keypad entry, or the opening of a flip panel on the handset.
    Type: Grant
    Filed: February 5, 1999
    Date of Patent: August 21, 2001
    Assignee: Neopoint, Inc.
    Inventors: William Y. Son, Jong T. Chung
  • Publication number: 20010004600
    Abstract: A wireless communication apparatus capable of providing information requests includes a wireless communication device having a wireless transceiver configured to send and receive communications across a wireless communication network. A hands-free unit can be included and coupled to the wireless communication device. The hands-free unit includes a speaker and a microphone configured to provide audio information to a user and to accept audio information from the user. A position determination system determines a location of the apparatus and provides position data indicative of such location to a server along with the information request. The server can process the information request along with the position information and provide a response to the request to the wireless communication apparatus.
    Type: Application
    Filed: January 2, 2001
    Publication date: June 21, 2001
    Applicant: NeoPoint, Inc.
    Inventors: William Y. Son, Jong T. Chung
  • Patent number: 6212408
    Abstract: A system and method for allowing a communication device to accepts voice commands from a user. The voice commands can include commands to execute or dial key sequences or commands to control device functionality. Voice commands are received from a user of the communication device, indicating a command to be carried out by said communication device. The commands are interpreted and executed by the communication device.
    Type: Grant
    Filed: May 3, 1999
    Date of Patent: April 3, 2001
    Assignee: Innovative Global Solution, Inc.
    Inventors: William Y. Son, Jong T. Chung, Swan Chen
  • Patent number: 6201957
    Abstract: A system and method for providing one or more tiers of alternative rates or rate plans to wireless telephone subscribers utilizes one or more home regions, in which the subscriber can make and receive wireless calls at reduced service rates. The home regions are preferably defined within the wireless subscriber's local calling area and can be defined as a region in proximity with the subscriber's home, office, or other location. Additionally, a second tier of reduced rate services can be provided in another region referred to as the home-perimeter region. The home-perimeter region, in one embodiment, is a subset of the home region, and preferably covers an area somewhat equivalent to the area covered by the subscriber's conventional land line services. As such, the subscriber can make wireless calls in or near his or her home, office, or other location at rates competitive to those offered by land line service providers.
    Type: Grant
    Filed: November 18, 1998
    Date of Patent: March 13, 2001
    Assignee: Neopoint, Inc.
    Inventors: William Y. Son, Yeong Jee Chung, Jong T. Chung
  • Patent number: 5750909
    Abstract: An apparatus for the preparation of a mixture of toner resin and initiator, to form a toner resin or toner mixture including cross-linked microgel particles is provided. The apparatus includes a toner extruder having the resin being conveyed therethrough and an adder for adding the initiator to the toner resin in the toner extruder to form the toner resin or mixture. The apparatus also includes a measurer for measuring the cross-linked microgel particles in the toner mixture substantially immediately after mixing in the toner extruder and transmitting a signal indicative of the quantity of cross-linked microgel particles in the toner resin or mixture. The apparatus also includes a controller for controlling the addition rate of initiator in response to the signals from the measurer.
    Type: Grant
    Filed: February 6, 1997
    Date of Patent: May 12, 1998
    Assignee: Xerox Corporation
    Inventors: Michael G. Hawkins, Hui Chang, Joo T. Chung, Jennifer E. Dewan, John J. Ianni, J. Stephen Kittelberger, Joseph L. Leonardo, Timothy L. Lincoln, Yvonne M. Kenney
  • Patent number: 5650484
    Abstract: An apparatus for the preparation of a mixture of toner resin and initiator, to form a toner resin or toner mixture including cross-linked microgel particles is provided. The apparatus includes a toner extruder having the resin being conveyed therethrough and an adder for adding the initiator to the toner resin in the toner extruder to form the toner resin or mixture. The apparatus also includes a measurer for measuring the cross-linked microgel particles in the toner mixture substantially immediately after mixing in the toner extruder and transmitting a signal indicative of the quantity of cross-linked microgel particles in the toner resin or mixture. The apparatus also includes a controller for controlling the addition rate of initiator in response to the signals from the measurer.
    Type: Grant
    Filed: July 12, 1995
    Date of Patent: July 22, 1997
    Assignee: Xerox Corporation
    Inventors: Michael G. Hawkins, Hui Chang, Joo T. Chung, Jennifer E. Dewan, John J. Ianni, J. Stephen Kittelberger, Joseph L. Leonardo, Timothy L. Lincoln, Yvonne M. Kenney
  • Patent number: 5631541
    Abstract: An electronic appliance such as a digital audio disk player in which either an external power source, or a secondary cell is employed as a power source, includes a signal reproducing unit, a recharging unit, a judging unit, a measuring unit, and a controller. To the signal reproducing unit, an operation power source voltage is applied from the external power source, or the secondary cell. The voltage from the external power source is applied to the recharging unit so as to recharge the secondary cell. The judging unit judges whether or not the voltage from the secondary cell is applied to the signal reproducing unit. The measuring unit measures a time period during which the voltage from the secondary cell is applied to the signal reproducing unit when the judgement result obtained from the judging unit indicates that the voltage from the secondary cell is applied.
    Type: Grant
    Filed: April 3, 1995
    Date of Patent: May 20, 1997
    Assignee: Sony Corporation
    Inventors: Kenichi Kabasawa, Lau S. Keang, Looi T. Chung, Shigeho Ogawa
  • Patent number: 5627467
    Abstract: A device for sensing the displacement of working members in industrial equipment is disclosed. The above sensing device includes cheap analog inductive sensors capable of maintaining the sensing characteristics irrespective of moisture and leaking water, thereby precisely sensing the displacements of the working members. The sensor housing of the device easily fixes the analog inductive sensor by simply fitting the sensor into a mount hole formed in the housing, thereby easily changing the troubled sensor with a new one and easily focusing the sensor when initially mounting the sensor to the housing. As a pair of analog inductive sensors are mounted to both side surfaces of the working member, the sensing device of this invention also prevents the operational errors to the sensors caused by the operational vibrations of the working members while sensing the displacements of the working members.
    Type: Grant
    Filed: November 29, 1995
    Date of Patent: May 6, 1997
    Assignee: Samsung Heavy Industries Co., Ltd.
    Inventors: Seong H. Lee, Sang T. Chung, Dong S. Lee
  • Patent number: 5601960
    Abstract: A process comprising:(a) reactive melt mixing of a base resin with a chemical initiator and crosslinking of said base resin to enable a highly crosslinked precursor resin, said highly crosslinked precursor resin being substantially free of sol, and comprising uncrosslinked portions and crosslinked portions, said crosslinked portions comprised of high density crosslinked microgel particles; and(b) accomplishing dilution by melt mixing said highly crosslinked precursor resin of (a) with a base resin to form a partially crosslinked toner resin, said toner resin being substantially free of sol, and comprising linear uncrosslinked portions and crosslinked portions, said crosslinked portions comprised essentially of high density crosslinked microgel particles, wherein said microgel particles are present in an amount of from about 1 to about 45 percent by weight of said toner resin.
    Type: Grant
    Filed: November 13, 1995
    Date of Patent: February 11, 1997
    Assignee: Xerox Corporation
    Inventors: Hadi K. Mahabadi, Enno E. Agur, T. Brian McAneney, Sheau V. Kao, Gerald R. Allison, Michael S. Hawkins, Bernard Grushkin, J. Stephen Kittelberger, Joo T. Chung, William H. Hollenbaugh, Jr.
  • Patent number: 5536613
    Abstract: A process for the preparation of pigmented toner compositions comprising: a) forming at a first temperature, a first melt mixture comprised of a partially crosslinked thermoplastic resin, pigment, optionally a wax, and optional additives, wherein the partially crosslinked thermoplastic resin is comprised of a mixture of crosslinked resin macrogel particles, crosslinked resin microgel particles, and uncrosslinked resin; and b) melt mixing at a second temperature, the first melt mixture to form a second mixture, wherein the macrogel particles are partially converted into microgel particles, and wherein the second temperature is less than or equal to the first temperature.
    Type: Grant
    Filed: February 23, 1995
    Date of Patent: July 16, 1996
    Assignee: Xerox Corporation
    Inventors: Hui Chang, Joo T. Chung, Joseph L. Leonardo, Enno E. Agur, John J. Ianni, Allison G. Thomas, Linda A. Flannery
  • Patent number: 5500324
    Abstract: A process comprising:(a) reactive melt mixing of a base resin with a chemical initiator and crosslinking of said base resin to enable a highly crosslinked precursor resin, said highly crosslinked precursor resin being substantially free of sol, and comprising uncrosslinked portions and crosslinked portions, said crosslinked portions comprised of high density crosslinked microgel particles; and(b) accomplishing dilution by melt mixing said highly crosslinked precursor resin of (a) with a base resin to form a partially crosslinked toner resin, said toner resin being substantially free of sol, and comprising linear uncrosslinked portions and crosslinked portions, said crosslinked portions comprised essentially of high density crosslinked microgel particles, wherein said microgel particles are present in an amount of from about 1 to about 45 percent by weight of said toner resin.
    Type: Grant
    Filed: October 31, 1994
    Date of Patent: March 19, 1996
    Assignee: Xerox Corporation
    Inventors: Hadi K. Mahabadi, Enno E. Agur, T. Brian McAneney, Sheau V. Kao, Gerald R. Allison, Michael S. Hawkins, Bernard Grushkin, J. Stephen Kittelberger, Joo T. Chung, William H. Hollenbaugh, Jr.
  • Patent number: D369564
    Type: Grant
    Filed: June 23, 1994
    Date of Patent: May 7, 1996
    Assignee: Johnson & Johnson Clinical Diagnostics, Inc.
    Inventors: Laura R. Whitby, Andrew T. Chung, Rodney Wright