Patents by Inventor James Chang

James 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: 20050004074
    Abstract: This invention relates to a method of reducing an irritating or adverse side effect associated with the topical use of an active ophthalmic drug comprising incorporating an effective amount of a cyclodextrin or cyclodextrin derivative into a formulation to complex the active drug such that the concentration of the free active drug is reduced below a tolerable threshold, and incorporating an effective amount of a viscosity increasing agent in said formulation such that the bioavailability of said drug is high enough to be therapeutically effective, wherein the cyclodextrin or cyclodextrin derivative is not required to solubilize the active drug. Another aspect of this invention relates to topical ophthalmic formulations comprising an active drug, a cyclodextrin or cyclodextrin derivative, and a viscosity-enhancing agent, in effective amounts as stated above.
    Type: Application
    Filed: July 1, 2003
    Publication date: January 6, 2005
    Inventors: Robert Lyons, James Chang
  • Publication number: 20040214797
    Abstract: A composition comprising a steroid, a cyclodextrin, and a polyhexamethylene biguanide is disclosed herein. Preservatives and methods related thereto, and experimental results suggesting certain advantages related to these compositions, preservatives, and methods are also presented herein.
    Type: Application
    Filed: May 13, 2004
    Publication date: October 28, 2004
    Applicant: ALLERGAN, INC.
    Inventors: Robert T. Lyons, James Chang, Chin-Ming Chang
  • Patent number: 6636374
    Abstract: A system for hardware intelligent speed monitoring and auto-retract is disclosed. The system contains a monitoring device that monitors the TACH (Tachometer) output of motor driver. The device provides a trigger to the signal processor and a retract mechanism to retract the actuator when the spindle motor speed is unexpectedly much higher or lower than normal speed. The system DSP (Digital Signal Processor) is unaware of such occurrence.
    Type: Grant
    Filed: April 19, 2000
    Date of Patent: October 21, 2003
    Assignee: Seagate Technology LLC
    Inventors: Ban Hok Goh, Nan Ling Goh, Tze Ming Jimmy Pang, Kah Liang Gan, LaiKein James Chang
  • Publication number: 20030180006
    Abstract: Waveguide based connector systems for optically coupling a fiber optic cable and an optoelectronic device and a method of fabricating the same are described. In one aspect, a connector system comprises an optical waveguide and an optical turn assembly. The optical waveguide has a first end and a second end. The first end of the optical waveguide is connectable to the fiber optic cable in an orientation aligned with a line-side connection axis. The optical turn assembly has a first optical port that is connected to the second end of the optical waveguide in an orientation aligned with a device-side connection axis, a second optical port that is oriented to communicate optically with the optoelectronic device along a device communication axis substantially intersecting the device-side connection axis, and an optical turn system that is operable to guide light along a path between the first optical port and the second optical port.
    Type: Application
    Filed: March 22, 2002
    Publication date: September 25, 2003
    Inventors: Ban-Poh Loh, James Chang, Pradeep Rajkomar, Brenton A. Baugh, Ronald T. Kaneshiro, Robert E. Wilson, James Williams
  • Patent number: 6623997
    Abstract: A submount substrate is used for the dual purposes of enabling simultaneous burn-in processing for a relatively large number of arrays of optical transmitters and enabling conventional dicing techniques to be used to form mounting-ready assemblies. In the preferred embodiment, the submount substrate is a silicon wafer that is specifically designed to provide connectivity between VCSEL arrays and burn-in equipment during the testing stage, but is also designed to be segmented and used in the final packaging stage. Because the submount is a silicon wafer, conventional integrated circuit fabrication techniques may be used to form conductive patterns that define array-receiving areas and that allow external circuitry to communicate with the various VCSEL arrays.
    Type: Grant
    Filed: December 15, 2000
    Date of Patent: September 23, 2003
    Assignee: Agilent Technologies, Inc.
    Inventors: James Chang, Ronald T. Kaneshiro, Stefano G. Therisod
  • Patent number: 6568981
    Abstract: A construction piece covered at least partially with display loop fabric and having one or more double sided hook-surfaced tabs removably affixed to said fabric so as to permit the attachment of one construction piece to another.
    Type: Grant
    Filed: February 8, 2000
    Date of Patent: May 27, 2003
    Inventor: James Chang
  • Patent number: 6537918
    Abstract: A method for plasma etching a semiconductor film stack. The film stack includes at least one layer comprising silicon oxynitride. The method includes etching the silicon oxynitride-comprising layer using an etchant gas mixture comprising chlorine and at least one compound containing fluorine and carbon. The atomic ratio of fluorine to chlorine in the etchant gas ranges between about 3:1 and about 0.01:1; preferably, between about 0.5:1 and about 0.01:1; most preferably, between about 0.25:1 and about 0.1:1. The etchant gas forms a fluorine-comprising polymer or species which deposits on exposed surfaces adjacent to the silicon oxynitride-comprising layer in an amount sufficient to reduce the etch rate of an adjacent material (such as a photoresist) while permitting the etching of the silicon oxynitride-comprising layer.
    Type: Grant
    Filed: July 31, 2001
    Date of Patent: March 25, 2003
    Assignee: Applied Materials Inc.
    Inventors: Pavel Ionov, Sung Ho Kim, Dean Li, Chun Yan, James Chang Wang
  • Publication number: 20020196180
    Abstract: A Method provides GPS signals to high altitude such as geostationary earth orbit GPS users. A GPS signal Generator system (10), GPS satellite position (20), designated High altitude GPS user locations (30), a GPS broadcast antenna control system (40), an antenna control mechanism (50), earth pointing GPS signal broadcast antenna (60) and high altitude GPS broadcast antenna/antennas (65) are integrated to provide GPS signals to designated high altitude locations.
    Type: Application
    Filed: June 25, 2001
    Publication date: December 26, 2002
    Inventor: Min-I James Chang
  • Publication number: 20020076841
    Abstract: A submount substrate is used for the dual purposes of enabling simultaneous burn-in processing for a relatively large number of arrays of optical transmitters and enabling conventional dicing techniques to be used to form mounting-ready assemblies. In the preferred embodiment, the submount substrate is a silicon wafer that is specifically designed to provide connectivity between VCSEL arrays and burn-in equipment during the testing stage, but is also designed to be segmented and used in the final packaging stage. Because the submount is a silicon wafer, conventional integrated circuit fabrication techniques may be used to form conductive patterns that define array-receiving areas and that allow external circuitry to communicate with the various VCSEL arrays.
    Type: Application
    Filed: December 15, 2000
    Publication date: June 20, 2002
    Inventors: James Chang, Ronald T. Kaneshiro, Stefano G. Therisod
  • Publication number: 20020016078
    Abstract: The present disclosure pertains to a method for plasma etching a semiconductor film stack. The film stack includes at least one layer comprising silicon oxynitride. The method includes etching the silicon oxynitride-comprising layer using an etchant gas mixture comprising chlorine and at least one compound containing fluorine and carbon. The atomic ratio of fluorine to chlorine in the etchant gas ranges between about 3:1 and about 0.01:1; preferably, between about 0.5:1 and about 0.01:1; most preferably, between about 0.25:1 and about 0.1:1. The etchant gas forms a fluorine-comprising polymer or species which deposits on exposed surfaces adjacent to the silicon oxynitride-comprising layer in an amount sufficient to reduce the etch rate of an adjacent material (such as a photoresist) while permitting the etching of the silicon oxynitride-comprising layer.
    Type: Application
    Filed: July 31, 2001
    Publication date: February 7, 2002
    Inventors: Pavel Ionov, Sung Ho Kim, Dean Li, Chun Yan, James Chang Wang
  • Patent number: 6291356
    Abstract: The present disclosure pertains to a method for plasma etching a semiconductor film stack. The film stack includes at least one layer comprising silicon oxynitride. The method includes etching the silicon oxynitride-comprising layer using an etchant gas mixture comprising chlorine and at least one compound containing fluorine and carbon. The atomic ratio of fluorine to chlorine in the etchant gas ranges between about 3:1 and about 0.01:1; preferably, between about 0.5:1 and about 0.01:1; most preferably, between about 0.25:1 and about 0.1:1. The etchant gas forms a fluorine-comprising polymer or species which deposits on exposed surfaces adjacent to the silicon oxynitride-comprising layer in an amount sufficient to reduce the etch rate of an adjacent material (such as a photoresist) while permitting the etching of the silicon oxynitride-comprising layer.
    Type: Grant
    Filed: May 24, 1999
    Date of Patent: September 18, 2001
    Assignee: Applied Materials, Inc.
    Inventors: Pavel Ionov, Sung Ho Kim, Dean Li, Chun Yan, James Chang Wang
  • Patent number: 6094163
    Abstract: Transfer/in-flight alignment technique using a Doppler velocity sensor. An aircraft navigation system (10 and/or 20), a Doppler velocity sensor (50) and an alignment filter (45) are used to align the inertial navigation system (4) of a slave vehicle. The velocity (and/or position) of the aircraft navigation system, the velocity (and/or position) of the slave vehicle's inertial navigation system (40) and the velocity measurement of a Doppler velocity sensor (50) are used to generate the measurements of the alignment filter (45). The DVS and aircraft navigation system are used simultaneously to align the inertial navigation system of the slave vehicle. A GPS receiver (60) with a GPS antenna (70), a Doppler velocity sensor (50) and an alignment filer (46) are used to align the inertial navigation system (40) of a flight vehicle.
    Type: Grant
    Filed: January 21, 1998
    Date of Patent: July 25, 2000
    Assignee: Min-I James Chang
    Inventor: Min-I James Chang
  • Patent number: 6016437
    Abstract: A cardiovascular catheter probe system suitable for electrophysiology mapping and radiofrequency ablation of cardiac tissue comprises a plurality of catheter shafts having a proximal end, a distal handle, and a lumen extending therebetween, wherein a distal portion of the shaft is deflectable and inflatable; the wavy soft distal section is inflatable to conform intimately to the irregular intracardiac tissue surface, wherein conducting electrodes are secured on the hills of said inflatable wavy soft shaft.
    Type: Grant
    Filed: August 21, 1998
    Date of Patent: January 18, 2000
    Assignee: Irvine Biomedical, Inc.
    Inventors: Hosheng Tu, Chi-Wu James Chang
  • Patent number: 5964634
    Abstract: A kit for building objects from block-like construction pieces comprising a plurality of construction pieces, each having a core made of resilient flexible foam material and having a plurality of planar faces, an outer cover snugly fitting over and completely covering the outer peripheral surface of the foam core made of a looped fabric and a plurality of double-sided hooked surface tabs for lockingly engaging with the loop fabric so that the construction pieces may be releasably assembled to one another and reinforcing strips adapted to be removably connected to tabs for bridging adjacent blocks.
    Type: Grant
    Filed: October 2, 1997
    Date of Patent: October 12, 1999
    Inventor: James Chang
  • Patent number: 5891027
    Abstract: A cardiovascular catheter system or catheter probe system suitable for electrophysiology mapping and radiofrequency ablation of cardiac tissue comprises a catheter shaft having a proximal end, a distal handle, and a lumen extending therebetween, whereby a distal portion of the shaft is deflectable; and the soft distal section is inflatable to conform intimately to the irregular intracardiac tissue surface.
    Type: Grant
    Filed: October 21, 1996
    Date of Patent: April 6, 1999
    Assignee: Irvine Biomedical, Inc.
    Inventors: Hosheng Tu, Chi-Wu James Chang
  • Patent number: 5740599
    Abstract: A method of making a cleaning scrubber comprising a step of preparing an elastic and reticulate tube, which is fitted over a locating set of a molding tool such that the tube is forced to expand and that the periphery of the tube is pleated. The expanded and pleated tube is then fastened with two resilient cords such that two fastened areas are opposite in location to each other and that two resilient cords form a ring located between the inner and the outer sides of the tube. Finally, the tube is removed from the molding foot and released to allow the periphery of the tube to expand along the cords serving as axes, so as to form a spherical cleaning scrubber.
    Type: Grant
    Filed: January 3, 1996
    Date of Patent: April 21, 1998
    Inventor: James Chang
  • Patent number: 5660597
    Abstract: A portable, compact, self-contained child pacifying device is disclosed for use with infant support structures. The device may be attached to such infant support structures through attachment means allowing ready attachment and removal of the pacifying device. The attachment means may include projecting tabs or a pivotable retaining arm located proximate a vibration dampening means. A biasing means retains the attachment means and the pacifying device in position. The device comprises an integral outer case structure within which a battery powered vibratory source is mounted to produce a vibrating motion. The outer case structure attaches to the child carrier through a mounting arrangement fixedly attached to the exterior of the case structure and attachable to the infant support structure.
    Type: Grant
    Filed: May 11, 1995
    Date of Patent: August 26, 1997
    Inventors: Lawrence A. Fox, James Chang, Stanley M. Kujawski
  • Patent number: 5142193
    Abstract: Apparatus for high speed analog data recording utilizing a new tube design (referred to herein as a photonic cathode ray tube) is presented. The photonic cathode ray tube includes a flat photocathode, a small aperture electron lensing system, a set of deflection plates and a phosphor screen.
    Type: Grant
    Filed: June 29, 1990
    Date of Patent: August 25, 1992
    Assignee: Kaman Sciences Corporation
    Inventors: James Chang, James J. Fanning
  • Patent number: 5013908
    Abstract: A fiber optic detection system comprising an array of fiber optic elements is presented. Each fiber optic element is uniquely encoded using a plurality of discrete ferquencies, digital codes or other encoding techniques. When a break occurs in one or more fiber optic elements, the missing light frequencies or digital codes are sensed, thereby indicating the break. Preferably, the fiber optic elements are arranged in a grid pattern so that precise location of the break can be made.
    Type: Grant
    Filed: November 28, 1988
    Date of Patent: May 7, 1991
    Assignee: Kaman Sciences Corporation
    Inventor: James Chang
  • Patent number: 4483378
    Abstract: A feeding device used for a wood working machine includes two roller assemblies respectively mounted to two roller supports which can be controlled to turn about horizontal axes and which in turn is supported by an upper portion mounted to a cantilever arm of a column. Each of roller assemblies includes at least two rows of rollers respectively mounted on at least two horizontal axes. By adjusting roller supports, these rollers can roll on a curve surface.
    Type: Grant
    Filed: April 12, 1983
    Date of Patent: November 20, 1984
    Inventors: James Chang, Jen-Wen Chang, Kai-Jou Chang, Horng-Tswen Chang