Patents by Inventor William W. Lu

William W. Lu 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: 7976568
    Abstract: The present invention relates generally to a device of and a method for correcting spinal deformities, such as scoliosis and kyphosis. The invention employs the superelasticity or pseudoelasticity, such as found in a nickel-titanium alloy, to provide a continuous, predictable, and controllable correction force and to achieve a gradual and full correction. The correction force can be exerted on the deformed spine either at the time of the spine surgery or after the surgery or both, to afford a full or substantially full correction. The continuous and controllable correction force of the present invention is safer than an instantaneous and large correction force applied only at the time of surgery. Additionally, the continuous and controllable correction force is capable of gradually and fully correcting the spinal deformities without any post-operative manipulation of the correction device or re-operation.
    Type: Grant
    Filed: August 25, 2003
    Date of Patent: July 12, 2011
    Assignees: University of Hong Kong, City University of Hong Kong
    Inventors: Kenneth M. Cheung, Kelvin W. K. Yeung, Chi Yuen Chung, William W. Lu
  • Patent number: 7803234
    Abstract: The invention provides a method for making surface treated shape memory materials such as from NiTi alloy using plasma immersion ion implantation and deposition and related ion-beam and plasma-based techniques to alter the surface properties of those materials primarily for biomedical applications. The surfaces are treated with nitrogen, oxygen, and carbon, but become bio-inactive after implanted with other elements such as silicon.
    Type: Grant
    Filed: January 11, 2006
    Date of Patent: September 28, 2010
    Assignees: Versitech Limited
    Inventors: Kelvin W. K. Yeung, Ray W. Y. Poon, Paul Kim-Ho Chu, Kenneth M. C. Cheung, William W. Lu
  • Patent number: 7789975
    Abstract: The present invention relates generally to a shape memory and/or super-elastic material, such as a nickel titanium alloy. Additionally or alternatively, the present invention relates to a super-elastic or pseudo-elastic material that has an initial transition temperature Af above a body temperature. The shape memory material can have a super-elasticity or pseudo-elasticity property at a temperature below the initial transition temperature Af of the material. For example, the shape memory material can have its workable temperature for producing super-elasticity or pseudo-elasticity of about 0° C. to 15° C. below the initial transition temperature Af. The shape memory material can be malleable at a room temperature, and become super-elastic or pseudo-elastic at a body temperature. In addition, the present invention relates to a method of making a shape memory or a super-elastic material.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: September 7, 2010
    Assignees: Versitech Limited, The City University of Hong Kong
    Inventors: Man Chee Kenneth Cheung, Kelvin W. K. Yeung, William W. Lu, C. Y. Chung
  • Patent number: 7443789
    Abstract: A system and method for protection switching in a transmission network is described. A protection switching mechanism comprises a multiplexer, a transmission path for each output of the multiplexer and a remote circuit. The multiplexer has an input coupled to receive an input signal and a plurality of outputs to output a plurality of output signals. Each transmission path is coupled to receive an associated output signal from the multiplexer. The transmission paths further include one or more redundant transmission paths, wherein signals directed to a faulty transmission path are redirected to an associated redundant transmission path. The remote circuit is used to selectively switch a redundant transmission path for a faulty transmission path at a subscriber.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: October 28, 2008
    Assignee: ADC DSL Systems, Inc.
    Inventors: Donald J. Glaser, Anthony Barrera, William W. Lu, Dennis P. Miller
  • Patent number: 7254217
    Abstract: A fault associated with a communication medium is analyzed by correlating a first set of information indicative of echo associated with the communication medium with a second set of information indicative of echo. The fault is characterized based on the correlation between the first set of information and the second set of information. The first set of information and the second set of information can include echo canceller coefficients generated by an echo canceller coupled to the communication medium.
    Type: Grant
    Filed: June 16, 2003
    Date of Patent: August 7, 2007
    Assignee: ADC DSL Systems, Inc.
    Inventors: Michael J. Rude, Ronald R. Gerlach, Mo-Ching Justine Lau, Tiet Pham, William W. Lu
  • Publication number: 20040114752
    Abstract: A fault associated with a communication medium is analyzed by correlating a first set of information indicative of echo associated with the communication medium with a second set of information indicative of echo. The fault is characterized based on the correlation between the first set of information and the second set of information. The first set of information and the second set of information can include echo canceller coefficients generated by an echo canceller coupled to the communication medium.
    Type: Application
    Filed: June 16, 2003
    Publication date: June 17, 2004
    Applicant: ADC DSL Systems, Inc.
    Inventors: Michael J. Rude, Ronald R. Gerlach, Mo-Ching Justine Lau, Tiet Pham, William W. Lu
  • Publication number: 20040106921
    Abstract: The present invention relates generally to a device of and a method for correcting spinal deformities, such as scoliosis and kyphosis. The invention employs the superelasticity or pseudoelasticity, such as found in a nickel-titanium alloy, to provide a continuous, predictable, and controllable correction force and to achieve a gradual and full correction. The correction force can be exerted on the deformed spine either at the time of the spine surgery or after the surgery or both, to afford a full or substantially full correction. The continuous and controllable correction force of the present invention is safer than an instantaneous and large correction force applied only at the time of surgery. Additionally, the continuous and controllable correction force is capable of gradually and fully correcting the spinal deformities without any post-operative manipulation of the correction device or re-operation.
    Type: Application
    Filed: August 25, 2003
    Publication date: June 3, 2004
    Inventors: Kenneth MC Cheung, Kelvin WK Yeung, CY Chung, William W. Lu
  • Publication number: 20030095502
    Abstract: A system and method for protection switching in a transmission network is described. A protection switching mechanism comprises a multiplexer, a transmission path for each output of the multiplexer and a remote circuit. The multiplexer has an input coupled to receive an input signal and a plurality of outputs to output a plurality of output signals. Each transmission path is coupled to receive an associated output signal from the multiplexer. The transmission paths further include one or more redundant transmission paths, wherein signals directed to a faulty transmission path are redirected to an associated redundant transmission path. The remote circuit is used to selectively switch a redundant transmission path for a faulty transmission path at a subscriber.
    Type: Application
    Filed: November 21, 2001
    Publication date: May 22, 2003
    Applicant: ADC DSL Systems, Inc.
    Inventors: Donald J. Glaser, Anthony Barrera, William W. Lu, Dennis P. Miller