Abstract: A single-stage AC-DC single-inductor multiple-output (SIMO) LED driver uses a single inductor (L) to drive multiple independent LED strings (341-34n) with Power Factor Correction (PFC). The driver uses a diode bridge (20) to achieve initial AC to DC conversion. The output of the bridge (20) is provided to a buck converter whose output is shared with multiple LED strings by a time division multiplex circuit. Feedback is used to separately control the current supplied to each LED string by using a separate reference for each string and controlling the width of the current pulse provided to a string. Current balancing in every LED string can be achieved with the same voltage reference without the need for additional circuitry.
Type:
Application
Filed:
April 23, 2015
Publication date:
March 29, 2018
Applicant:
VERSITECH LIMITED
Inventors:
Yue GUO, Ting Leung Albert LEE, Sinan LI, Siew Chong TAN, Chi Kwan LEE, Shu Yuen HUI
Abstract: A device for engagement with a bone includes a dynamically expandable tip (12), a dynamically expandable ring (40), or other dynamically expandable insert (60, 62, 401L) that reacts to forces pushing the implant into bone tissue. The tip (12), ring (40) or insert (60, 62, 401L) expands at least normal to the direction of motion, increasing contact area between the surrounding bone tissue and the material and thereby reducing the occurrence of high areas of contact stress in the adjacent bone tissue. The tip (12), ring (40) or insert (60, 62, 401L) translates forces along an axis of motion into lateral frictional forces that can resist penetration into the bone tissue without the need for additional operator or patient interaction. A method of reducing migration of the device for engagement includes the steps of providing the device and inserting the device within bone tissue.
Type:
Application
Filed:
April 1, 2016
Publication date:
March 29, 2018
Applicant:
VERSITECH LIMITED
Inventors:
Sloan Austin KULPER, William Weijia LU, Frankie Ka Li LEUNG, Christian Xinshuo FANG
Abstract: The present invention is a diagnostic kit and materials for: 1) the prediction of the long-term response of a chronic hepatitis B virus (HBV) carrier to treatment with nucleoside/nucleotide analog, or their combination; 2) the detection of HBV variants that exhibit reduced reactivity to antibody detection; 3) the detection of HBV variants in the precore/core region that negatively affect the course of liver disease; 4) the identification of the HBV genotype.
Type:
Grant
Filed:
March 31, 2009
Date of Patent:
January 30, 2018
Assignee:
VERSITECH LIMITED
Inventors:
Kaimin Chan, Vivian Nap Yee Chan, Ching Lung Lai, Man Fung Yuen
Abstract: The subject invention provides efficient and convenient methods of isolating 9-oxo-10E, 12E-octadecadienoic acid methyl ester (9-KODE methyl ester) from C. versicolor. In addition, the subject invention provides therapeutic uses of Coriolus versicolor extracts, biologically-active chemical substituents isolated from C. versicolor, as well as 9-KODE methyl ester and related compounds. In a preferred embodiment, the subject invention can be used to inhibit the metastatic spread of cancer cells.
Type:
Grant
Filed:
June 16, 2014
Date of Patent:
January 9, 2018
Assignees:
BAGI RESEARCH LIMITED, VERSITECH LIMITED
Inventors:
Allan Sik Yin Lau, Lai Hung Cindy Yang, Stanley Chi Chung Chik
Abstract: The subject invention pertains to attenuated influenza viruses, and related vaccines and methods, comprising a genetically modified viral genome. The genetically modified viral genome comprises a disruption in the non-structural (NS1) coding segment and one or more base substitution in the matrix membrane protein coding segment. The genetic modifications result in viruses that lose NS1 functionality, yet remain replication competent.
Type:
Grant
Filed:
November 13, 2015
Date of Patent:
November 28, 2017
Assignees:
THE UNIVERSITY OF HONG KONG, VERSITECH LIMITED
Inventors:
Honglin Chen, Min Zheng, Kwok-Yung Yuen
Abstract: Methods for preparing capsules, such as micro- and/or nanocapsules from all-aqueous emulsions are described herein. The method includes mixing, combining, or contacting a first electrically charged phase containing a first solute with at least an optionally charged second phase containing a second solute. The solutes are incompatible with each other. The electrostatic forces between the two solutions induce the formation of droplets of a dispersed phase in a continuous phase. The droplets are then solidified to form the capsules.
Abstract: Methods for preparing all-aqueous emulsions, including stable emulsions or emulsions having high viscosity and/or ultra-low interfacial tension are described. The method includes mixing, combining, or contacting a first electrically charged phase containing a first solute (e.g., dispersed phase) with at least a second phase containing a second solute (e.g., continuous phase). The solutes are incompatible with each other. The electrostatic forces between the two phases induce the formation of droplets of a dispersed phase in a continuous phase. The dispersed and continuous phases contain oppositely charged molecules, such as surfactants or other macromolecules and colloids which stabilize the drops of the dispersed phase. Complex coacervation of the oppositely charged molecules or colloids at the interface of the two aqueous phases results in formation of a membrane or barrier which prevents coalescence or aggregation of the droplets.
Abstract: The present invention provides a power control circuit connectable to a load adapted to receive a power supply, the power control circuit adapted to absorb power from the power supply and adapted to deliver power to the power supply to stabilize at least one electrical parameter of the power supply. The present invention also provides an associated method of stabilizing at least one electrical parameter of a power supply connectable to a load, the method including absorbing power from the power supply or delivering power to the power supply. The at least one electrical parameter of the power supply includes parameters such as voltage and frequency.
Type:
Application
Filed:
March 30, 2017
Publication date:
September 7, 2017
Applicants:
CITY UNIVERSITY OF HONG KONG, VERSITECH LIMITED
Inventors:
Shu Yuen Ron HUI, Chi Kwan LEE, Felix Fulih WU
Abstract: The present invention relate to methods and codecs for image and video compression. Embodiments of the present invention include a novel shape-adaptive model-based codec (SAM) that supports binary shapes as well as matte and soft segmentation image compression by decomposing input shapes into deterministic and stochastic components for flexible lossy and lossless coding. The present invention can provide inter/intra prediction and flexibly adapts between lossy and lossless modes with various parameters for compression quality control. The compression module can also be adapted with numerous other compression techniques.
Type:
Application
Filed:
February 24, 2017
Publication date:
August 31, 2017
Applicant:
Versitech Limited
Inventors:
Shing Chow Chan, Zhouchi Lin, An Ling Liu
Abstract: A one-step method for fabricating solidified particles from all-aqueous emulsion droplets involves solidification and drying of the droplets by osmosis. According to this method the fabrication of solidified particles is induced by implementing a high osmotic pressure gradient between the internal phase and external phase of the all-aqueous emulsion. The resultant extraction of water leads to solidification of the emulsion droplets. This approach provides mild conditions for encapsulating bioactive ingredients or other delicate components to conveniently fabricate bio- and cyto-compatible particles because it does not involve the introduction of external energy used in conventional drying. Such conventional external energy inputs are time-consuming, so the method is more efficient.
Abstract: Compositions which self-assemble under physiological conditions are formulated for application to wounds. The formulations include a pharmaceutically acceptable carrier or are provided as part of a medical device or coating. The formulations may also include other therapeutic, prophylactic or diagnostic agents. The formulation can be administered as appropriate for treatment of one or more disorders or conditions. For example, the formulation may be applied to repair an injury or during surgery of the lung, eye or dura, or following an epidural or spinal tap, to stop leakage of blood, interstitial fluid, or cerebrospinal fluid. The formulation may be administered to a burn or ulcer. The formulation may be dispersed in a suture or adhesive for administration at the time of or as released following suturing or gluing of a wound, thereby limiting bleeding, loss of tissue fluids, or other fluids such as those produced by parenchymal tissues such as the liver, pancreas, and gastrointestinal tract.
Type:
Application
Filed:
November 2, 2016
Publication date:
May 25, 2017
Applicants:
Massachusetts Institute of Technology, Versitech Limited
Inventors:
Rutledge Ellis-Behnke, Yu-Xiang Liang, Gerald E. Schneider, Kwok-Fai So, David K.C. Tay
Abstract: The subject invention provides novel and advantageous materials and methods for treating neuroinflammation, neurodegenerative disease, and cerebrovascular disease by modulating TNF-? and/or nitric oxide production. Specifically exemplified herein is the therapeutic use of senkyunolide A (Sen A) and Z-ligustilide (Z-Lig), compounds isolated from traditional Chinese medicinal material Ligusticum chuanxiong (LCX).
Type:
Grant
Filed:
January 12, 2011
Date of Patent:
May 23, 2017
Assignees:
VERSITECH LIMITED, BAGI RESEARCH LIMITED
Inventors:
Allan Sik Yin Lau, Lai Hung Cindy Yang, Cho Tsun Or
Abstract: Methods and compositions for identifying autoimmune diabetes are provided. One aspect provides a method for the evaluation of risk and progression of autoimmune diabetes in mammalian subjects. The method includes measuring the enzymatic activities and/or protein concentrations of neutrophil elastase and proteinase 3 in a subject and comparing the measured levels of these proteases to respective reference levels.
Abstract: Provided herein are methods of modulating membrane potential of a cell membrane using self-assembling compounds. Also provided herein are methods of regulating a natural voltage-dependent ion channel in a cell membrane using the self-assembling compounds disclosed herein. Further provided herein are methods of treating, preventing and/or managing a disease that is related to the abnormal membrane potential responses by using the self-assembling compounds disclosed herein.
Type:
Grant
Filed:
December 18, 2008
Date of Patent:
April 4, 2017
Assignees:
VERSITECH LIMITED, THE CHINESE UNIVERSITY OF HONG KONG
Inventors:
Dan Yang, Xiang Li, Bing Shen, Xiao-Qiang Yao
Abstract: Method are described for inhibiting movement of a bodily fluid and/or contaminants on or in an animal comprising administering to the animal self-assembling peptidomimetics, including ?-peptides, ?-peptides, ?-peptides, and/or ?-peptides.
Type:
Grant
Filed:
June 23, 2015
Date of Patent:
December 6, 2016
Assignees:
Massachusetts Institute of Technology, Versitech Limited
Inventors:
Rutledge Ellis-Behnke, Yu-Xiang Liang, Gerald E. Schneider, Kwok-Fai So, David K. C. Tay
Abstract: Annexin A3 (ANAX3) is utilized as a biomarker for the diagnosis and prognosis of hepatocellular carcinoma (HCC) and the utilization of a monoclonal antibody against ANXA3 or antisense polynucleotide against ANXA3 mRNA for the suppression or treatment of HCC, alone or in combination with other HCC treatment. Monoclonal antibody against ANXA3 can be administered for the suppression of tumor growth, metastasis, and chemoresistance.
Type:
Grant
Filed:
September 12, 2014
Date of Patent:
November 8, 2016
Assignee:
VERSITECH LIMITED
Inventors:
Stephanie Kwai Yee Ma, Man Tong, Xin-Yuan Guan
Abstract: Methods for inducing, expanding, and/or generating alloantigen-specific regulatory T cells. Alloantigen-specific regulatory T cells can be induced, expanded, and/or generated from naive CD4+CD25? T cells by using CD40-activated B cells. The regulatory T cells can be human T cells. In one embodiment, the alloantigen-specific human regulatory T cells can be CD4highCD25+Foxp3+ regulatory T cells.
Type:
Grant
Filed:
January 10, 2014
Date of Patent:
November 1, 2016
Assignees:
VERSITECH LIMITED, THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY
Inventors:
Wenwei Tu, Yu-Lung Lau, David Bram Lewis
Abstract: Transgenic plants having increased growth rate, increased sugar content, and increase yield are disclosed, and methods for making the same. The transgenic plants have a gene coding for a phosphatase having a C-terminal motif under control of a heterologous promoter incorporated into the genomic DNA of the plant.
Abstract: Compositions that include nanoscale structured materials or precursors thereof (e.g., self: assembling peptides) are described. The compositions can include other substances (e.g., a vasoconstrictor). Also described are methods for using the compositions to promote hemostasis, to protect the skin or wounds from contamination, to decontaiminate a site upon removal of previously applied compositions that provided a protective coating, and to inhibit the movement of bodily substances other than blood. The compositions are also useful in isolating tissue, removing tissue, preserving tissue (for, e.g., subsequent transplantation or reattachment), and as bulking, stabilizing or hydrating agents. Medical devices that include the compositions (e.g., a stent or catheter), bandages or other wound dressings, sutures, and kits that include the compositions are also described.
Type:
Application
Filed:
April 5, 2016
Publication date:
October 13, 2016
Applicants:
Massachusetts Institute of Technology, Versitech Limited
Inventors:
Rutledge Ellis-Behnke, Yu-Xiang Liang, Gerald E. Schneider, Kwok-Fai So, David K.C. Tay, Shuguang Zhang
Abstract: A method has been developed to produce stable cell-matrix microspheres with up to 100% encapsulation efficiency and high cell viability, using matrix or biomaterial systems with poor shape and mechanical stability for applications including cell therapeutics via microinjection or surgical implantation, 3D culture for in vitro expansion without repeated cell splitting using enzymatic digestion or mechanical dissociation and for enhanced production of therapeutic biomolecules, and in vitro modeling for morphogenesis studies. The modified droplet generation method is simple and scalable and enables the production of cell-matrix microspheres when the matrix or biomaterial system used has low concentration, with slow phase transition, with poor shape and mechanical stability.
Type:
Grant
Filed:
February 18, 2014
Date of Patent:
October 11, 2016
Assignee:
Versitech Limited
Inventors:
Barbara Pui Chan, Godfrey Chi-Fung Chan, Hoi Ling Wong, Pik To Cheung, Song-Eng Kathryn Cheah, Danny Chan