Patents by Inventor David D. Chang

David D. 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: 20120059441
    Abstract: Phototherapeutic systems with an integral, or adapted for use with an, optical calibration system. A dynamic programmable phototherapeutic treatment system, wherein the treatment device is responsive to a stored treatment plan to generate a predetermined therapeutic UV light signal for application to a treatment surface region of a patient/user.
    Type: Application
    Filed: February 28, 2011
    Publication date: March 8, 2012
    Applicant: Lemer Medical Devices, Inc.
    Inventors: David D. Chang, Setsuo Tanaka, Jake Pananen
  • Patent number: 6864066
    Abstract: Polynucleotide and polypeptide sequences encoding a novel tumor suppressor protein, EPLIN, are provided. Also included is a method for detecting a cell proliferative disorder associated with EPLIN. EPLIN is a marker that can be used diagnostically, prognostically and therapeutically over the course of cell proliferative disorders associated with EPLIN.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: March 8, 2005
    Assignee: The Regents of the University of California
    Inventors: David D. Chang, Raymond S. Maul
  • Publication number: 20030054417
    Abstract: Nucleic acid molecule and polypeptide sequences encoding a novel tumor suppressor protein, EPLIN, are provided. Also included is a method for detecting a cell proliferative disorder associated with EPLIN. EPLIN is a marker that can be used diagnostically, prognostically and therapeutically over the course of cell proliferative disorders associated with EPLIN.
    Type: Application
    Filed: February 13, 2001
    Publication date: March 20, 2003
    Inventors: David D. Chang, Raymond S. Maul
  • Patent number: 6409391
    Abstract: An adaptor assembly for coupling light guide connectors of varying configurations to a structure housing a source of focused light includes an internal adaptor having an internal optic guide element, a coupling structure, a housing, and a connector locking mechanism. The coupling structure can be inserted into and releasably retained within the structure housing the focused light. A light guide connector is inserted into a light guide receiving channel formed in the housing and is releasably retained therein by the connector locking mechanism. An internal optic guide element extends through the coupling structure to transmit focused light from the source of focused light to the light guide connector inserted into the connector-receiving channel. The housing includes heat dissipating elements to facilitate dissipation of heat generated at the interface between the optic guide element and the light guide of the connector.
    Type: Grant
    Filed: March 22, 2000
    Date of Patent: June 25, 2002
    Assignee: Cogent Light Technologies, Inc.
    Inventor: David D. Chang
  • Patent number: 5452392
    Abstract: The present invention provides a fiber optic coupling apparatus for coupling light from a high power light source into a fiber optic while preventing thermal damage to the fiber optic at the fiber-to-light source coupling. The light source comprises a housing having a fiber input structure with inner surfaces defining a through-hole for receiving the fiber optic. The fiber input structure has outer surfaces which define a substantially conical profile of the structure that extends within the housing such that an axis of symmetry of the fiber input structure is substantially coincident with the light input to the fiber optic. The fiber input structure is further made from a high heat conductivity material and has a reflective coating on an input end face for reflecting light that is outside the acceptance angle of the fiber optic, but incident upon the fiber input structure.
    Type: Grant
    Filed: June 20, 1994
    Date of Patent: September 19, 1995
    Assignee: Cogent Light Technologies, Inc.
    Inventors: Glenn S. Baker, David D. Chang
  • Patent number: 5446818
    Abstract: The present invention provides a fiber optic connector having a shielding apparatus for protecting the exposed end of a fiber optic. The shielding apparatus of the connector generally comprises a cylindrical housing, a collet, and a protective sleeve. The cylindrical housing comprises first and second ends and a through-hole for reception of a fiber optic having a fiber optic end protruding from the first end of the cylindrical housing. The collet comprises a tubular body with first and second ends and a through-hole passing between the ends for movable reception of the cylindrical housing, with the second end of the tubular body being split to form a plurality of prongs arranged coaxially with the through-hole of the collet.
    Type: Grant
    Filed: May 5, 1994
    Date of Patent: August 29, 1995
    Assignee: Cogent Light Technologies, Inc.
    Inventors: Glenn S. Baker, David D. Chang, Fred P. Paulino
  • Patent number: 4796131
    Abstract: A Winchester or hard disk drive, with a head positioner rotor is provided with a bidirectional preloaded stop. The head positioner rotor is provided with a plate having two spaced stop surfaces, both of which engage a single stop, which may be in the form of a U-shaped spring, which is partially compressed, and which has two pivoted, high strength plastic members against which the stop surfaces of the head positioner rotor impinge. The plate may also be provided with a notch into which the armature of an electromagnet fits so that the head positioner rotor is locked in the position with the heads adjacent the drive spindle, when the drive is turned off. When the rotor is energized, and the disks get up to speed, the electromagnetic is energized, and the head positioner rotor is freed to move to a selected track for reading or writing digital information.
    Type: Grant
    Filed: October 9, 1987
    Date of Patent: January 3, 1989
    Assignee: Micropolis Corporation
    Inventor: David D. Chang