Patents by Inventor David Leung

David Leung 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: 12172691
    Abstract: The present disclosure discloses a camping cart, which comprises a moving part, an X-shaped supporting foldable part, an X-shaped connecting part and a load-bearing bottom rod. The moving part comprises a front wheel and a universal wheel, the front wheel is installed at the front end of the X-shaped supporting foldable part; wherein the surface of the front wheel is covered with an electric conductor, the front wheel is rotatably connected with a frame, the front wheel rolls pivotably in the frame, a magnet frame is built in the frame, the magnet frame is located on the upper side of the front wheel, a magnet is provided on one side of the magnet frame close to the front wheel, and the magnet frame is capable of rising and falling in the frame to adjust the distance between the magnet frame and the front wheel.
    Type: Grant
    Filed: December 16, 2022
    Date of Patent: December 24, 2024
    Inventor: David Leung
  • Publication number: 20240157991
    Abstract: The present disclosure discloses a camping cart, which comprises a moving part, an X-shaped supporting foldable part, an X-shaped connecting part and a load-bearing bottom rod. The moving part comprises a front wheel and a universal wheel, the front wheel is installed at the front end of the X-shaped supporting foldable part; wherein the surface of the front wheel is covered with an electric conductor, the front wheel is rotatably connected with a frame, the front wheel rolls pivotably in the frame, a magnet frame is built in the frame, the magnet frame is located on the upper side of the front wheel, a magnet is provided on one side of the magnet frame close to the front wheel, and the magnet frame is capable of rising and falling in the frame to adjust the distance between the magnet frame and the front wheel.
    Type: Application
    Filed: December 16, 2022
    Publication date: May 16, 2024
    Inventor: David Leung
  • Patent number: 11116313
    Abstract: A foldable storage rack, including side frames, connecting arms and shelves. When unfolded, the foldable storage rack can satisfy a user's storage needs, and when the foldable storage rack is being transported or idle, the side frames, the connecting arms and the shelves of the foldable storage rack are folded in an interlinked manner. The foldable storage rack in a folded state occupies a small space and is convenient for storage and transportation.
    Type: Grant
    Filed: January 20, 2020
    Date of Patent: September 14, 2021
    Assignee: Vigor Household Goods Co., Ltd
    Inventor: David Leung
  • Publication number: 20210161290
    Abstract: The present invention discloses a foldable storage rack, comprising side frames, connecting arms and shelves. When unfolded, the foldable storage rack can satisfy a user's storage needs, and when the foldable storage rack is being transported or idle, the side frames, the connecting arms and the shelves of the foldable storage rack are folded in an interlinked manner. The foldable storage rack in a folded state occupies a small space and is convenient for storage and transportation. Additionally, in the unfolding or folding process, it is unnecessary to disassemble or assemble components, advantageous for preventing components from missing.
    Type: Application
    Filed: January 20, 2020
    Publication date: June 3, 2021
    Inventor: David Leung
  • Patent number: 8974242
    Abstract: A posable strain relief for use with a cable which can he bent into a particular shape by the user, and which retains that shape, thus allowing modification to suit a specific environment or use.
    Type: Grant
    Filed: August 16, 2012
    Date of Patent: March 10, 2015
    Assignee: Monster, LLC
    Inventors: Noel Lee, Kendrew Lee, Jacky Hsiung, David Leung
  • Patent number: 8748577
    Abstract: Disclosed are biologically active protein conjugates that comprise a biologically active polypeptide coupled via a peptide bond to a polypeptide comprising from 2 to about 500 units of a repeating peptide motif, wherein the biologically active protein conjugate exhibits a modified plasma half-life compared to the intrinsic half-life of the unconjugated biologically active polypeptide or protein. Also disclosed are methods of making and using the conjugated proteins, as well as methods for determining whether a given conjugate exhibits a modified half life relative to the intrinsic half life of the unconjugated polypeptide.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: June 10, 2014
    Assignee: Cell Therapeutics, Inc.
    Inventors: Marc Besman, Stewart Chipman, David Leung, Jack Singer
  • Publication number: 20140051279
    Abstract: A possible strain relief for use with a cable which can he bent into a particular shape by the user, and which retains that shape, thus allowing modification to suit a specific environment or use.
    Type: Application
    Filed: August 16, 2012
    Publication date: February 20, 2014
    Applicant: Monster, LLC
    Inventors: Noel Lee, Kendrew Lee, Jacky Hsiung, David Leung
  • Publication number: 20130279512
    Abstract: A lighting housing for installation in a building having a source of electrical power, including a support structure; a junction box coupled to the support structure and to the source of electrical power; a lighting enclosure coupled to the support structure and mechanically and electrically supporting an electric light powered from the source of electrical power received through the junction box; and an RF mesh network transceiver, coupled to the support structure and powered from the junction box, for participation in a mesh network.
    Type: Application
    Filed: April 19, 2012
    Publication date: October 24, 2013
    Applicant: One Touch Mediaroom, LLC
    Inventors: Terence Fung, David Leung
  • Publication number: 20130114816
    Abstract: A device for the sharing audio signals. A pair of headphones includes circuitry for connecting to an audio signal input, as is typical, but also for connecting to an audio signal output.
    Type: Application
    Filed: January 3, 2011
    Publication date: May 9, 2013
    Inventors: Noel Lee, David Leung
  • Publication number: 20120269374
    Abstract: This invention provides continuously adjustable headphones that utilize a ball and socket hinge arrangement that allows the ear cup shell portion of the headphone to rotate in any direction, allowing the speaker housing to articulate about the ball joint in any directional plane to provide comfort and superior acoustic performance.
    Type: Application
    Filed: December 20, 2011
    Publication date: October 25, 2012
    Inventors: Noel Lee, David Leung
  • Publication number: 20120253092
    Abstract: A post fractionation process for removing heavy hydrocarbons from the C4+ olefins conversion process reactor effluent, which act as foulants when recycled to the C4+ olefins conversion reactor. This simple and effective process improves the run length of the reactor by reducing catalyst fouling, which also improves yields in a C4+ olefins conversion process to light olefins. Essential to present invention is the efficient recycling of a hydrocarbon stream to the reactor, utilizing well proven equipment in a novel way to separate more valuable product from less desirable components in the recycle product stream.
    Type: Application
    Filed: March 31, 2011
    Publication date: October 4, 2012
    Applicant: STONE & WEBSTER PROCESS TECHNOLOGY, INC.
    Inventors: CORNELIS F. VAN EGMOND, DAVID LEUNG
  • Publication number: 20120252717
    Abstract: Disclosed are biologically active protein conjugates that comprise a biologically active polypeptide coupled via a peptide bond to a polypeptide comprising from 2 to about 500 units of a repeating peptide motif, wherein the biologically active protein conjugate exhibits a modified plasma half-life compared to the intrinsic half-life of the unconjugated biologically active polypeptide or protein. Also disclosed are methods of making and using the conjugated proteins, as well as methods for determining whether a given conjugate exhibits a modified half life relative to the intrinsic half life of the unconjugated polypeptide.
    Type: Application
    Filed: January 31, 2012
    Publication date: October 4, 2012
    Applicant: CELL THERAPEUTICS, INC.
    Inventors: Marc Besman, Stewart Chipman, David Leung, Jack Singer
  • Patent number: 8258852
    Abstract: A motor driver circuit for driving the gate node of a high-side driver transistor to a boosted voltage from a charge pump draws little or no static current from the charge pump. The gate node is pulled to the boosted voltage by a p-channel pullup-control transistor that is driven by p-channel transistors that are pumped by capacitors that cut off current flow to ground from the charge pump. An n-channel output-shorting transistor shorts the gate node to the output when the high-side driver is turned off. A coupling capacitor initializes the shorting transistor for each output transition. A p-channel output-sensing transistor generates a feedback to a second stage that drives the coupling capacitor. P-channel diode transistors and an n-channel equalizing transistor control the voltage on the coupling capacitor.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: September 4, 2012
    Assignee: Hong Kong Applied Science and Technology Research Institute Co., Ltd.
    Inventors: Lap Chi David Leung, Yat Tung Lai, Chun Fai Wong, Kam Hung Chan, Kwok Kuen David Kwong
  • Publication number: 20120126736
    Abstract: A motor driver circuit for driving the gate node of a high-side driver transistor to a boosted voltage from a charge pump draws little or no static current from the charge pump. The gate node is pulled to the boosted voltage by a p-channel pullup-control transistor that is driven by p-channel transistors that are pumped by capacitors that cut off current flow to ground from the charge pump. An n-channel output-shorting transistor shorts the gate node to the output when the high-side driver is turned off. A coupling capacitor initializes the shorting transistor for each output transition. A p-channel output-sensing transistor generates a feedback to a second stage that drives the coupling capacitor. P-channel diode transistors and an n-channel equalizing transistor control the voltage on the coupling capacitor.
    Type: Application
    Filed: November 18, 2010
    Publication date: May 24, 2012
    Applicant: Hong Kong Applied Science & Technology Research Institute Company Limited
    Inventors: Lap Chi (David) LEUNG, Yat Tung LAI, Chun Fai WONG, Kam Hung CHAN, Kwok Kuen KWONG
  • Patent number: 8179455
    Abstract: A Optical Black Pixel (OBP) cancellation circuit corrects offsets in sensors in a CCD/CMOS image sensor when reading dark pixels such at the periphery. A pixel voltage is switched to a sampling capacitor during two phases of the same pixel pulse. Sampling capacitors and feedback capacitors connect to differential inputs of an amplifier. An accumulating capacitor accumulates voltage differences and generates a common-mode voltage that is fed back to another sampling capacitor that stores an amplifier offset. The sampling capacitor and accumulating capacitor and their associated switches form a discrete-time first-order low-pass filter that filters the pixel voltage during the first phase. In the second phase the amplifier acts as a unity-gain amplifier to output an average of the pixel voltage differences generated during an OBP time when blackened or covered pixels are read from the image sensor.
    Type: Grant
    Filed: March 11, 2010
    Date of Patent: May 15, 2012
    Assignee: Hong Kong Applied Science and Technology Research Institute Co., Ltd.
    Inventors: Lap Chi (David) Leung, Yat Tung Lai, Chun Fai Wong, Kam Hung Chan, Kwok Kuen (David) Kwong
  • Patent number: 8129348
    Abstract: Disclosed are biologically active protein conjugates that comprise a biologically active polypeptide coupled via a peptide bond to a polypeptide comprising from 2 to about 500 units of a repeating peptide motif, wherein the biologically active protein conjugate exhibits a modified plasma half-life compared to the intrinsic half-life of the unconjugated biologically active polypeptide or protein. Also disclosed are methods of making and using the conjugated proteins, as well as methods for determining whether a given conjugate exhibits a modified half life relative to the intrinsic half life of the unconjugated polypeptide.
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: March 6, 2012
    Assignee: Cell Therapeutics, Inc.
    Inventors: Marc Besman, Stewart Chipman, David Leung, Jack Singer
  • Patent number: D675436
    Type: Grant
    Filed: December 23, 2011
    Date of Patent: February 5, 2013
    Assignee: Gizmo Dorks, LLC
    Inventors: Michael Hsiao, David Leung, Baldwin Thai, Elisa Bounlom
  • Patent number: D675437
    Type: Grant
    Filed: December 23, 2011
    Date of Patent: February 5, 2013
    Assignee: Gizmo Dorks, LLC
    Inventors: Michael Hsiao, David Leung, Baldwin Thai, Elisa Bounlom
  • Patent number: D675438
    Type: Grant
    Filed: December 23, 2011
    Date of Patent: February 5, 2013
    Assignee: Gizmo Dorks, LLC
    Inventors: Michael Hsiao, David Leung, Baldwin Thai, Elisa Bounlom
  • Patent number: D1055444
    Type: Grant
    Filed: October 14, 2022
    Date of Patent: December 24, 2024
    Assignee: Zhongshan Vigor Household Goods Co., Ltd
    Inventor: David Leung