Patents by Inventor Wai Kok

Wai Kok 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: 10450295
    Abstract: This invention relates to methods of reversing and inhibiting liver fibrosis and hepatitis using a small indolinone molecule Hesperadin and related compounds. Methods of identifying such agents and using them to inhibit the expression of collagens and ECM proteins including MMPs and TIMPs in purified hepatic stellate cells are provided. In vivo data of Hesperadin in inhibiting induced collagen production are presented. This method of specifically targeting drugs to hepatic stellate cells in vivo, provides a novel therapy for liver diseases.
    Type: Grant
    Filed: August 9, 2013
    Date of Patent: October 22, 2019
    Assignee: Acclaim BioMed USA LLC
    Inventors: Kenneth Ka-Ho Lee, Stanton Hon-Lung Kok, Tsz-Wai Kok, Sing-Wan Wong, John Yeuk-Hon Chan
  • Publication number: 20150045395
    Abstract: This invention relates to methods of reversing and inhibiting liver fibrosis and hepatitis using a small indolinone molecule Hesperadin and related compounds. Methods of identifying such agents and using them to inhibit the expression of collagens and ECM proteins including MMPs and TIMPs in purified hepatic stellate cells are provided. In vivo data of Hesperadin in inhibiting induced collagen production are presented. This method of specifically targeting drugs to hepatic stellate cells in vivo, provides a novel therapy for liver diseases.
    Type: Application
    Filed: August 9, 2013
    Publication date: February 12, 2015
    Applicant: Acclaim BioMed USA LLC
    Inventors: Kenneth Ka-Ho Lee, Stanton Hon-Lung Kok, Tsz-Wai Kok, Sing-Wan Wong, John Yeuk-Hon Chan
  • Patent number: 8569850
    Abstract: A sensor for acoustic applications such as a silicone microphone is provided containing a backplate provided with apertures and a flexible diaphragm formed from a silicon on insulator (SOI) wafer which includes a layer of heavily doped silicon, a layer of silicon and an intermediate oxide layer that is connected to, and insulated from the backplate. The arrangement of the diaphragm in relation to the rest of the sensor and the sensor location, being mounted over the aperture in a PCB, reduces the acoustic signal pathway which allows the sensor to be both thinner and more importantly, enables there to be a greater back volume.
    Type: Grant
    Filed: October 10, 2007
    Date of Patent: October 29, 2013
    Assignee: Sensfab Pte Ltd
    Inventors: Kitt-Wai Kok, Kok Meng Ong, Kathirgamasundaram Sooriakumar, Bryan Keith Patmon
  • Patent number: 8111046
    Abstract: A constant voltage/constant power AC adapter converts AC voltage to DC voltage to provide power to a plurality of loads. The adapter's output characteristic is approximately a constant voltage as long as the output current draw by the loads is less than a threshold (e.g., a safety threshold for the adapter). If, however, the power draw on the adapter is such that the output current exceeds the threshold, the adapter then decreases its output voltage to maintain the power draw at a safe level. One or more loads that draw power from the adapter may be adapted to detect a drop in the AC adapter's output voltage. When such a voltage drop is detected, that information tells the load that too much current is being drawn from the adapter and that the load should throttle back (e.g., reducing battery charge current, CPU clock frequency, display brightness, etc.).
    Type: Grant
    Filed: July 12, 2005
    Date of Patent: February 7, 2012
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Thomas P. Sawyers, James Mun Wai Kok
  • Patent number: 8098870
    Abstract: A silicon microphone comprising a backplate of electrically conductive or semi-conductive material comprising a rigid aperture area and a surrounding area, a diaphragm of electrically conductive or semi-conductive material comprising a flexible member that extends over the aperture area and a surrounding area that is at least partially connected to, and insulated from, the surrounding area of the backplate, the aperture area of the backplate and flexible member of the diaphragm forming two parallel plates of a capacitor spaced apart by a cavity, a bond pad formed on the surrounding area of the diaphragm, a bond pad formed on the surrounding area of the backplate, a channel formed in the diaphragm surrounding the bond pad formed on the surrounding area of the backplate, at least one air channel formed in the surrounding area of the diaphragm and open into the cavity between the flexible member and the aperture area of the backplate, and at least one vent through the surrounding area of the diaphragm connected
    Type: Grant
    Filed: May 15, 2006
    Date of Patent: January 17, 2012
    Assignee: Sensfab Pte Ltd
    Inventors: Kitt-Wai Kok, Kok Meng Ong, Kathirgamasunda Sooriakumar, Bryan Keith Patmon
  • Publication number: 20100187646
    Abstract: A sensor including: a backplate of electrically conductive or semi-conductive material, the backplate including a plurality of backplate holes; a diaphragm of electrically conductive or semi-conductive material that is connected to, and insulated from the backplate, the diaphragm defining a flexible member and an air gap associated with the flexible member; a bond pad formed on an area of the backplate surrounding the cavity; and a bond pad formed on an area of the diaphragm surrounding the air gap; wherein the flexible member and air gap defined by the diaphragm extend beneath the plurality of backplate holes.
    Type: Application
    Filed: October 10, 2007
    Publication date: July 29, 2010
    Applicant: Mems Technology BHD
    Inventors: Kitt-Wai Kok, Kok Meng Ong, Kathirgamasundaram Sooriakumar, Bryan Keith Patmon
  • Publication number: 20090229471
    Abstract: The present invention relates to a coffee maker and more specifically to a two cups automatic coffee maker with flow control in a precise manner, particular to a one cup coffee in desired volume, a two reservoirs type design to avoid overfill and able to have two different tastes, with a manual reset thermostat controls to turn off the heaters while brewing cycle is completed.
    Type: Application
    Filed: March 17, 2008
    Publication date: September 17, 2009
    Inventors: Man Fai Lun, Chi Wai Kok
  • Publication number: 20080185669
    Abstract: A silicon microphone includes a diaphragm that is able to flex over an aperture, an area allowing electrical connection to the diaphragm, a backplate parallel to and spaced apart from the diaphragm and extending over the aperture, the backplate being fixed, the backplate and diaphragm forming the parallel plates of a capacitor, the backplate and diaphragm being attached to and insulated from each other around at least a portion the boundary of the aperture, and a backplate support attached to the backplate around the boundary of the aperture, the backplate support not forming an electrical connection with the backplate.
    Type: Application
    Filed: October 18, 2005
    Publication date: August 7, 2008
    Applicant: SENSFAB PTE, LTD.
    Inventors: Kitt-Wai Kok, Kok Meng Ong, Kathirgamasundaram Sooriakumar, Bryan Keith Patmon
  • Publication number: 20080175417
    Abstract: A silicon microphone comprising a backplate of electrically conductive or semi-conductive material comprising a rigid aperture area and a surrounding area, a diaphragm of electrically conductive or semi-conductive material comprising a flexible member that extends over the aperture area and a surrounding area that is at least partially connected to, and insulated from, the surrounding area of the backplate, the aperture area of the backplate and flexible member of the diaphragm forming two parallel plates of a capacitor spaced apart by a cavity, a bond pad formed on the surrounding area of the diaphragm, a bond pad formed on the surrounding area of the backplate, a channel formed in the diaphragm surrounding the bond pad formed on the surrounding area of the backplate, at least one air channel formed in the surrounding area of the diaphragm and open into the cavity between the flexible member and the aperture area of the backplate, and at least one vent through the surrounding area of the diaphragm connected
    Type: Application
    Filed: May 15, 2006
    Publication date: July 24, 2008
    Applicant: Sensfab Pte Ltd.
    Inventors: Kitt-Wai Kok, Kok Meng Ong, Kathirgamasundaram Sooriakumar, Bryan Keith Patmon
  • Patent number: 7361523
    Abstract: The invention comprises a method of fabricating a three-axis accelerometer. A first wafer having a first and a second major surface provided with etching at least two cavities in the first major surface of the first wafer and patterning metal onto the first major surface of the first wafer to form electrical connections for a third accelerometer. A second wafer, etching a portion of a first major surface of the second wafer and bonding the first major surface of the first wafer to the first major surface of the second wafer. The etching and bonding of the surfaces deposit and pattern metallizating, and deposit and pattern a masking layer on the second major surface of the second wafer, defining the shape of a first, a second and the third accelerometer. The first and second accelerometers are formed over the cavities etched in the first major surface of the first wafer.
    Type: Grant
    Filed: August 11, 2004
    Date of Patent: April 22, 2008
    Assignee: Sensfab Pte Ltd
    Inventors: Kathirgamasundaram Sooriakumar, Kitt-Wai Kok, Bryan Keith Patmon
  • Patent number: 7247248
    Abstract: The invention relates to a method for forming silicon atomic force microscope tips. The method includes the steps of depositing a masking layer onto a first layer of doped silicon so that some square or rectangular areas of the first layer of doped silicon are not covered by the masking layer, etching pyramidal apertures in the first layer of doped silicon, removing the masking layer, depositing a second layer of doped silicon onto the first layer of doped silicon, the second layer of doped silicon being oppositely doped to the first layer of doped silicon and etching away the first layer of doped silicon. Further steps may be added to form the atomic force microscope tips at the end of cantilevers.
    Type: Grant
    Filed: May 20, 2003
    Date of Patent: July 24, 2007
    Assignee: Sensfab Pte Ltd
    Inventors: Lay Har Angeline Tee, Kim Pong Daniel Chir, Kitt-Wai Kok, Kathirgamasundaram Sooriakumar, Bryan Keith Patmon
  • Publication number: 20070065968
    Abstract: A silicon microphone is formed using the steps of providing a first wafer including a layer of heavily doped silicon, a layer of silicon and an intermediate layer of oxide between the two silicon layers. The first wafer has a first major surface on one surface of the layer of heavily doped silicon and a second major surface on the layer of silicon. A second wafer of silicon has a first major surface and a second major surface. A layer of oxide is formed on at least the first major surfaces of the first and second wafers. A cavity is etched through the oxide layer on the first major surface of the first wafer and into the layer of heavily doped silicon. The first major surface of the first wafer is bonded to the first major surface of the second wafer. A metal layer is formed on the second major surface of the second wafer. Acoustic holes are patterned and etched in the metal layer and in the second major surface of the second wafer.
    Type: Application
    Filed: May 26, 2004
    Publication date: March 22, 2007
    Inventors: Kit-Wai Kok, Kok Ong, Kathirgamasundaram Sooriakumar, Bryan Patmon
  • Publication number: 20070059857
    Abstract: The invention comprises a method of fabricating a three-axis accelerometer. A first wafer having a first and a second major surface provided with etching at least two cavities in the first major surface of the first wafer and patterning metal onto the first major surface of the first wafer to form electrical connections for a third accelerometer. A second wafer, etching a portion of a first major surface of the second wafer and bonding the first major surface of the first wafer to the first major surface of the second wafer. The etching and bonding of the surfaces deposit and pattern metallizating, and deposit and pattern a masking layer on the second major surface of the second wafer, defining the shape of a first, a second and the third accelerometer. The first and second accelerometers are formed over the cavities etched in the first major surface of the first wafer.
    Type: Application
    Filed: August 11, 2004
    Publication date: March 15, 2007
    Inventors: Kathirgamasundaram Sooriakumar, Kitt-Wai Kok, Bryan Patmon
  • Publication number: 20050242786
    Abstract: A constant voltage/constant power AC adapter converts AC voltage to DC voltage to provide power to a plurality of loads. The adapter's output characteristic is approximately a constant voltage as long as the output current draw by the loads is less than a threshold (e.g., a safety threshold for the adapter). If, however, the power draw on the adapter is such that the output current exceeds the threshold, the adapter then decreases its output voltage to maintain the power draw at a safe level. One or more loads that draw power from the adapter may be adapted to detect a drop in the AC adapter's output voltage. When such a voltage drop is detected, that information tells the load that too much current is being drawn from the adapter and that the load should throttle back (e.g., reducing battery charge current, CPU clock frequency, display brightness, etc.).
    Type: Application
    Filed: July 12, 2005
    Publication date: November 3, 2005
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Thomas Sawyers, James Wai Kok
  • Patent number: 6950950
    Abstract: A constant voltage/constant power AC adapter converts AC voltage to DC voltage to provide power to a plurality of loads. The adapter's output characteristic is approximately a constant voltage as long as the output current draw by the loads is less than a threshold (e.g. a safety threshold for the adapter). If, however, the power draw on the adapter is such that the output current exceeds the threshold, the adapter then decreases its output voltage to maintain the power draw at a safe level. One or more loads that draw power from the adapter may be adapted to detect a drop in the AC adapter's output voltage. When such a voltage drop is detected, that information tells the load that too much current is being drawn from the adapter and that the load should throttle back (e.g., reducing battery charge current, CPU clock frequency, display brightness, etc.).
    Type: Grant
    Filed: December 28, 2001
    Date of Patent: September 27, 2005
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Thomas P. Sawyers, James Mun Wai Kok
  • Publication number: 20050161430
    Abstract: The invention relates to a method for forming silicon atomic force microscope tips. The method includes the steps of depositing a masking layer onto a first layer of doped silicon so that some square or rectangular areas of the first layer of doped silicon are not covered by the masking layer, etching pyramidal apertures in the first layer of doped silicon, removing the masking layer, depositing a second layer of doped silicon onto the first layer of doped silicon, the second layer of doped silicon being oppositely doped to the first layer of doped silicon and etching away the first layer of doped silicon. Further steps may be added to form the atomic force microscope tips at the end of cantilevers.
    Type: Application
    Filed: May 20, 2003
    Publication date: July 28, 2005
    Inventors: Tee Angeline, Kim Chir, Kitt-Wai Kok, Kathirgamasundaram Sooriakumar, Bryan Patmon
  • Publication number: 20050151653
    Abstract: There is provided a trap for trapping animals including: at least one radio frequency (RF) device closely associated with the trap for the recording of activation data of the trap, at least one animal containment unit incorporated with the trap, and at least one sensor for detecting activation of the trap and passing an activation signal to the RF device. Preferably, the RF device is for transmitting RF signals to at least one receiving unit for enabling the real-time determination of a status of the trap.
    Type: Application
    Filed: July 23, 2004
    Publication date: July 14, 2005
    Inventors: Wee Chan, Fook Kuan, Wai Kok
  • Patent number: 6668325
    Abstract: The present invention provides obfuscation techniques for enhancing software security. In one embodiment, a method for obfuscation techniques for enhancing software security includes selecting a subset of code (e.g., compiled source code of an application) to obfuscate, and obfuscating the selected subset of the code. The obfuscating includes applying an obfuscating transformation to the selected subset of the code. The transformed code can be weakly equivalent to the untransformed code. The applied transformation can be selected based on a desired level of security (e.g., resistance to reverse engineering). The applied transformation can include a control transformation that can be creating using opaque constructs, which can be constructed using aliasing and concurrency techniques. Accordingly, the code can be obfuscated for enhanced software security based on a desired level of obfuscation (e.g., based on a desired potency, resilience, and cost).
    Type: Grant
    Filed: June 9, 1998
    Date of Patent: December 23, 2003
    Assignee: InterTrust Technologies
    Inventors: Christian Sven Collberg, Clark David Thomborson, Douglas Wai Kok Low
  • Publication number: 20030126474
    Abstract: A constant voltage/constant power AC adapter converts AC voltage to DC voltage to provide power to a plurality of loads. The adapter's output characteristic is approximately a constant voltage as long as the output current draw by the loads is less than a threshold (e.g. a safety threshold for the adapter). If, however, the power draw on the adapter is such that the output current exceeds the threshold, the adapter then decreases its output voltage to maintain the power draw at a safe level. One or more loads that draw power from the adapter may be adapted to detect a drop in the AC adapter's output voltage. When such a voltage drop is detected, that information tells the load that too much current is being drawn from the adapter and that the load should throttle back (e.g., reducing battery charge current, CPU clock frequency, display brightness, etc.).
    Type: Application
    Filed: December 28, 2001
    Publication date: July 3, 2003
    Inventors: Thomas P. Sawyers, James Mun Wai Kok