Patents by Inventor Leung Lau

Leung Lau 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: 20170251990
    Abstract: A cart for housing components of a medical navigation system is provided. The cart comprises a frame including a substantially horizontal base having a bottom side and a top side with wheels attached to the bottom side, a substantially vertical column attached to the top side of the base, and a ballast attached to the base to function as a counterweight to avoid tipping of the cart.
    Type: Application
    Filed: October 17, 2014
    Publication date: September 7, 2017
    Inventors: Leila KHERADPIR, William Wai-Leung LAU, Joshua Lee RICHMOND, Thanh Vinh VUONG
  • Publication number: 20170045619
    Abstract: Methods, computer program products, and computer systems for recovering data of scene are provided. The techniques include: obtaining, by at least one processor, data of a scene; re-sampling, by the at least one processor, the data of the scene to obtain re-sampled sensing data of the scene and a corresponding sensing matrix; and constructing, by the at least one processor, recovered data of the scene using the re-sampled sensing data of the scene and the corresponding sensing matrix. In one embodiment, the method includes enhancing occluded data of the scene to construct the recovered data of the scene, where the recovered data of the scene facilitates identification of the scene. In another embodiment, the method includes compressing original data of a scene, the compressing including sampling the original data of the scene to select the data of the scene.
    Type: Application
    Filed: August 22, 2016
    Publication date: February 16, 2017
    Applicant: Vencore Labs, Inc.
    Inventors: Chi Leung LAU, Ted K. WOODWARD
  • Patent number: 9436974
    Abstract: Methods, computer program products, and computer systems for recovering data of scene are provided. The techniques include: obtaining, by at least one processor, data of a scene; re-sampling, by the at least one processor, the data of the scene to obtain re-sampled sensing data of the scene and a corresponding sensing matrix; and constructing, by the at least one processor, recovered data of the scene using the re-sampled sensing data of the scene and the corresponding sensing matrix. In one embodiment, the method includes enhancing occluded data of the scene to construct the recovered data of the scene, where the recovered data of the scene facilitates identification of the scene. In another embodiment, the method includes compressing original data of a scene, the compressing including sampling the original data of the scene to select the data of the scene.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: September 6, 2016
    Assignee: Vencore Labs, Inc.
    Inventors: Chi Leung Lau, Ted K. Woodward
  • Publication number: 20150243004
    Abstract: Methods, computer program products, and computer systems for recovering data of scene are provided. The techniques include: obtaining, by at least one processor, data of a scene; re-sampling, by the at least one processor, the data of the scene to obtain re-sampled sensing data of the scene and a corresponding sensing matrix; and constructing, by the at least one processor, recovered data of the scene using the re-sampled sensing data of the scene and the corresponding sensing matrix. In one embodiment, the method includes enhancing occluded data of the scene to construct the recovered data of the scene, where the recovered data of the scene facilitates identification of the scene. In another embodiment, the method includes compressing original data of a scene, the compressing including sampling the original data of the scene to select the data of the scene.
    Type: Application
    Filed: February 24, 2015
    Publication date: August 27, 2015
    Applicant: VENCORE LABS, INC.
    Inventors: Chi Leung LAU, Ted K. WOODWARD
  • Patent number: 7994985
    Abstract: The present invention provides a patch antenna comprising a patch spaced from a ground plane and two L-shaped feed probes. Each feed probe is connected to a respective input port and has a portion extending parallel to the patch. The antenna further includes at least two walls extending from the ground plane towards the patch. The walls are positioned between the L-shaped feed probes so as to permit direct propagation between the input ports and also to create indirect diffraction paths between the input ports that serve to cancel at least a part of said direct propagation.
    Type: Grant
    Filed: May 26, 2009
    Date of Patent: August 9, 2011
    Assignee: City University of Hong Kong
    Inventors: Kwai Man Luk, Ka Leung Lau
  • Publication number: 20100302104
    Abstract: The present invention provides a patch antenna comprising a patch spaced from a ground plane and two L-shaped feed probes. Each feed probe is connected to a respective input port and has a portion extending parallel to the patch. The antenna further includes at least two walls extending from the ground plane towards the patch. The walls are positioned between the L-shaped feed probes so as to permit direct propagation between the input ports and also to create indirect diffraction paths between the input ports that serve to cancel at least a part of said direct propagation.
    Type: Application
    Filed: May 26, 2009
    Publication date: December 2, 2010
    Inventors: Kwai Man LUK, Ka Leung LAU
  • Patent number: 7035938
    Abstract: A technique for physically implementing a network of nodes in a virtual private network. To physically set-up all required connections in the network, a heuristic link selection algorithm is devised to systematically and efficiently determine interconnection links that realize the virtual private network subject to service level agreement requirements.
    Type: Grant
    Filed: December 7, 2000
    Date of Patent: April 25, 2006
    Assignee: Telcordia Technologies, Inc.
    Inventor: Chi Leung Lau
  • Publication number: 20060053683
    Abstract: A housing is provided for attracting and eradicating mosquitoes. The interior walls of the housing is painted with a dark color such as black and it is coupled to a water container with an air duct. An electrified conductive grid is mounted at a large front opening of the main housing. A mixture of water and charcoal is placed in the water container. A louver panel is mounted in front of the electrified conductive grid to provide a shield as well as a canopy against rain and sun light. An interior container having a plurality of open top compartment is located in the main housing with various selected organic materials placed in those compartments for creating an environment in the main housing attractive to various types of mosquitoes.
    Type: Application
    Filed: September 13, 2004
    Publication date: March 16, 2006
    Inventor: Leung Lau
  • Publication number: 20030033430
    Abstract: Methods and systems are provided for identifying the flow of data between a source and destination in a network. A pair of flow monitors may identify a plurality of data packets flowing between a pair of measuring points in a network. The flow monitors may then compare address information of each identified data packet. When the flow monitors identify matching addresses through the comparison, the addresses of the corresponding data packets are associated with the flow between the measuring points. Once the flow between the pair of measuring points is identified, the flow monitors may compare the header information of the data packets associated with the flow to determine the direction of the flow between the measuring points.
    Type: Application
    Filed: July 20, 2001
    Publication date: February 13, 2003
    Inventors: Chi Leung Lau, Bruce Siegell
  • Publication number: 20020112074
    Abstract: A technique for physically implementing a network of nodes in a virtual private network. To physically set-up all required connections in the network, a heuristic link selection algorithm is devised to systematically and efficiently determine interconnection links that realize the virtual private network subject to service level agreement requirements.
    Type: Application
    Filed: December 7, 2000
    Publication date: August 15, 2002
    Inventor: Chi Leung Lau
  • Patent number: 6077889
    Abstract: A light stabilizer package is disclosed. The light stabilizer package comprises a monomeric HALS having a pKa of no greater than 7, an ultraviolet light absorber and, optionally, a polymeric HALS having a pKa of less than 7. The light stabilizer package may be blended with a thermoplastic olefin to form a moldable light stable composition. An article comprising the moldable light stable composition may have an exterior surface that is at least partially coated.
    Type: Grant
    Filed: March 24, 1993
    Date of Patent: June 20, 2000
    Assignee: Solvay Engineered Polymers
    Inventors: Edmund Kwok-Leung Lau, David K. Edge
  • Patent number: 6051637
    Abstract: A light stabilizer package is disclosed. The light stabilizer package comprises a monomeric HALS having a pKa of no greater than 7, an ultraviolet light absorber and, optionally, a polymeric HALS having a pKa of less than 7. The light stabilizer package may be blended with a thermoplastic olefin to form a moldable light stable composition. An article comprising the moldable light stable composition may have an exterior surface that is at least partially coated.
    Type: Grant
    Filed: December 10, 1997
    Date of Patent: April 18, 2000
    Assignee: Solvay Engineered Polymers
    Inventors: Edmund Kwok-Leung Lau, David K. Edge
  • Patent number: 5733956
    Abstract: A light stabilizer package is disclosed. The light stabilizer package comprises a monomeric HALS having a pKa of no greater than 7, an ultraviolet light absorber and, optionally, a polymeric HALS having a pKa of less than 7. The light stabilizer package may be blended with a thermoplastic olefin to form a moldable light stable composition. An article comprising the moldable light stable composition may have an exterior surface that is at least partially coated.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: March 31, 1998
    Assignee: Solvay Engineered Polymers
    Inventors: Edmund Kwok-Leung Lau, David K. Edge
  • Patent number: 5260978
    Abstract: A Residual Time Stamp (RTS) technique provides a method and apparatus for recovering the timing signal of a constant bit rate input service signal at the destination node of a synchronous ATM telecommunication network. At the source node, a free-running P-bit counter counts cycles in a common network clock. At the end of every RTS period formed by N service clock cycles, the current count of the P-bit counter, defined as the RTS, is transmitted in the ATM adaptation layer. Since the absolute number of network clock cycles likely to fall within an RTS period will fall within a range determined by N, the frequencies of the network and service clocks, and the tolerance of the service clock, P is chosen so that the 2.sup.P possible counts, rather than representing the absolute number of network clock cycles an RTS period, provide sufficient information for unambiguously representing the number of network clock cycles within that predetermined range.
    Type: Grant
    Filed: October 30, 1992
    Date of Patent: November 9, 1993
    Assignee: Bell Communications Research, Inc.
    Inventors: Paul E. Fleischer, Chi-Leung Lau
  • Patent number: 4961188
    Abstract: A sychronous frequency encoding technique (SFET) provides method and apparatus for recovering the timing of an isochronous source node input service signal at the destination node of a synchronous ATM telecommunication network despite cell jitter which arises from the broadband multiplexing and switching delays in the network. A source node control clock is employed which is of greater frequency than that of the service signal and as a result a data under-flow condition occurs in the cell assembly process at a rate that is a function of the difference between such clock frequencies. Regular cell transmission is inhibited for a period at each under-flow occurrence and this pseudo-"stuffed cell" gap is signaled by setting a flag bit carried by an ensuing transmitted cell.
    Type: Grant
    Filed: September 7, 1989
    Date of Patent: October 2, 1990
    Assignee: Bell Communications Research, Inc.
    Inventor: Chi-Leung Lau
  • Patent number: 4835763
    Abstract: A survivable ring network is disclosed that can withstand a cut link or failed node, without the need for a central controller or protection switching among links. The disclosed invention comprises two rings carrying identical multiplexed node-to-node communications in opposite directions. When a system error is detected in a downstream node, error signals are inserted in all subrate channels. Each subrate channel receiver receives identical communications from each ring. If one subrate channel has an error signal, the receiver selects the alternate channel.
    Type: Grant
    Filed: February 4, 1988
    Date of Patent: May 30, 1989
    Assignee: Bell Communications Research, Inc.
    Inventor: Chi-Leung Lau
  • Patent number: 4625288
    Abstract: A method of structuring vectorized data obtained by scanning a drawing or other document comprising the steps of displaying on a computer controlled display screen a template image comprising template lines and nodes corresponding to the acquired image data and selecting portions of the acquired image data to be designated for inclusion in a restructured image data set by using a screen cursor to select the corresponding template lines displayed on the screen. Inclusion designations are subsequently and selectively removed as desired from portions of the acquired image data from the structured data set by using the cursor to select the corresponding lines and nodes on the screen. When the desired portions of the acquired data set are selectively designated for inclusion in the restructured data set, all remaining designated data is copied into the restructured image data.
    Type: Grant
    Filed: October 1, 1984
    Date of Patent: November 25, 1986
    Assignee: Tektronix, Inc.
    Inventors: Herbert S. Weiner, William L. Mills, Charles E. Perkins, Chi-Leung Lau, Jeffrey P. Mayhew, Samuel Y. Gordon
  • Patent number: RE36633
    Abstract: A Residual Time Stamp (RTS) technique provides a method and apparatus for recovering the timing signal of a constant bit rate input service signal at the destination node of a synchronous ATM telecommunication network. At the source node, a free-running P-bit counter counts cycles in a common network clock. At the end of every RTS period formed by N service clock cycles, the current count of the P-bit counter, defined as the RTS, is transmitted in the ATM adaptation layer. Since the absolute number of network clock cycles likely to fall within an RTS period will fall within a range determined by N, the frequencies of the network and service clocks, and the tolerance of the service clock, P is chosen so that the 2.sub.P possible counts, rather than representing the absolute number of network clock cycles an RTS period, provide sufficient information for unambiguously representing the number of network clock cycles within that predetermined range.
    Type: Grant
    Filed: November 8, 1995
    Date of Patent: March 28, 2000
    Assignee: Telcordia Technologies, Inc.
    Inventors: Paul E. Fleischer, Chi-Leung Lau
  • Patent number: D788915
    Type: Grant
    Filed: October 17, 2014
    Date of Patent: June 6, 2017
    Assignee: SYNAPTIVE MEDICAL (BARBADOS) INC.
    Inventors: Leila Kheradpir, William Wai-Leung Lau, Gal Sela, Joshua Lee Richmond
  • Patent number: D794787
    Type: Grant
    Filed: October 17, 2014
    Date of Patent: August 15, 2017
    Assignee: SYNAPTIVE MEDICAL (BARBADOS) INC.
    Inventors: Leila Kheradpir, William Wai-Leung Lau, Gal Sela, Neil Witcomb