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).
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Publication number: 20170251990Abstract: 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: ApplicationFiled: October 17, 2014Publication date: September 7, 2017Inventors: Leila KHERADPIR, William Wai-Leung LAU, Joshua Lee RICHMOND, Thanh Vinh VUONG
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Publication number: 20170045619Abstract: 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: ApplicationFiled: August 22, 2016Publication date: February 16, 2017Applicant: Vencore Labs, Inc.Inventors: Chi Leung LAU, Ted K. WOODWARD
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Patent number: 9436974Abstract: 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: GrantFiled: February 24, 2015Date of Patent: September 6, 2016Assignee: Vencore Labs, Inc.Inventors: Chi Leung Lau, Ted K. Woodward
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Publication number: 20150243004Abstract: 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: ApplicationFiled: February 24, 2015Publication date: August 27, 2015Applicant: VENCORE LABS, INC.Inventors: Chi Leung LAU, Ted K. WOODWARD
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Patent number: 7994985Abstract: 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: GrantFiled: May 26, 2009Date of Patent: August 9, 2011Assignee: City University of Hong KongInventors: Kwai Man Luk, Ka Leung Lau
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Publication number: 20100302104Abstract: 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: ApplicationFiled: May 26, 2009Publication date: December 2, 2010Inventors: Kwai Man LUK, Ka Leung LAU
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Patent number: 7035938Abstract: 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: GrantFiled: December 7, 2000Date of Patent: April 25, 2006Assignee: Telcordia Technologies, Inc.Inventor: Chi Leung Lau
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Publication number: 20060053683Abstract: 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: ApplicationFiled: September 13, 2004Publication date: March 16, 2006Inventor: Leung Lau
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Publication number: 20030033430Abstract: 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: ApplicationFiled: July 20, 2001Publication date: February 13, 2003Inventors: Chi Leung Lau, Bruce Siegell
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Publication number: 20020112074Abstract: 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: ApplicationFiled: December 7, 2000Publication date: August 15, 2002Inventor: Chi Leung Lau
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Patent number: 6077889Abstract: 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: GrantFiled: March 24, 1993Date of Patent: June 20, 2000Assignee: Solvay Engineered PolymersInventors: Edmund Kwok-Leung Lau, David K. Edge
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Patent number: 6051637Abstract: 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: GrantFiled: December 10, 1997Date of Patent: April 18, 2000Assignee: Solvay Engineered PolymersInventors: Edmund Kwok-Leung Lau, David K. Edge
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Patent number: 5733956Abstract: 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: GrantFiled: June 5, 1995Date of Patent: March 31, 1998Assignee: Solvay Engineered PolymersInventors: Edmund Kwok-Leung Lau, David K. Edge
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Patent number: 5260978Abstract: 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: GrantFiled: October 30, 1992Date of Patent: November 9, 1993Assignee: Bell Communications Research, Inc.Inventors: Paul E. Fleischer, Chi-Leung Lau
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Patent number: 4961188Abstract: 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: GrantFiled: September 7, 1989Date of Patent: October 2, 1990Assignee: Bell Communications Research, Inc.Inventor: Chi-Leung Lau
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Patent number: 4835763Abstract: 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: GrantFiled: February 4, 1988Date of Patent: May 30, 1989Assignee: Bell Communications Research, Inc.Inventor: Chi-Leung Lau
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Patent number: 4625288Abstract: 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: GrantFiled: October 1, 1984Date of Patent: November 25, 1986Assignee: Tektronix, Inc.Inventors: Herbert S. Weiner, William L. Mills, Charles E. Perkins, Chi-Leung Lau, Jeffrey P. Mayhew, Samuel Y. Gordon
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Patent number: RE36633Abstract: 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: GrantFiled: November 8, 1995Date of Patent: March 28, 2000Assignee: Telcordia Technologies, Inc.Inventors: Paul E. Fleischer, Chi-Leung Lau
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Patent number: D788915Type: GrantFiled: October 17, 2014Date of Patent: June 6, 2017Assignee: SYNAPTIVE MEDICAL (BARBADOS) INC.Inventors: Leila Kheradpir, William Wai-Leung Lau, Gal Sela, Joshua Lee Richmond
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Patent number: D794787Type: GrantFiled: October 17, 2014Date of Patent: August 15, 2017Assignee: SYNAPTIVE MEDICAL (BARBADOS) INC.Inventors: Leila Kheradpir, William Wai-Leung Lau, Gal Sela, Neil Witcomb