Patents by Inventor Peter Ma

Peter Ma 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: 7542887
    Abstract: Methods for performing a dynamic analysis of complex systems are described. The dynamic analysis of complex systems is performed by sub-structuring of the system into a plurality of sub-structures. The sub-structures and the interfaces between the sub-structures are modelled using a generalized eigenvector analysis of a discretized model of a full system or a subassembly thereof comprising at least two sub-structures. The sub-structures then are combined at the interfaces into a combined system. The combined system then is solved. Optionally, selected sub-structures may be reduced. Performing such a dynamic analysis allows studying characteristics such as e.g. vibration and/or acoustical effects in a computational efficient way. Such methods can be applied for optimizing designs of such complex systems.
    Type: Grant
    Filed: April 14, 2006
    Date of Patent: June 2, 2009
    Assignee: LMS International NV
    Inventors: Marc Brughmans, Peter Mas, Rabah Hadjit, Eike Brechlin, Stijn Donders
  • Patent number: 7407747
    Abstract: A dry composition comprising a nucleotide linked to a fluorescent dye is provided. A method of making a dry composition comprising the step of drying a solution comprising a nucleotide linked to a fluorescent dye is provided. A method is provided for performing a reaction on a nucleic acid substrate comprising: (a) providing a vessel containing a dried composition comprising a nucleotide linked to a fluorescent dye, and (b) adding to the vessel an aqueous solution and the nucleic acid substrate. A kit is provided for determining the sequence of a nucleic acid, the kit comprising a dry composition comprising a nucleotide linked to a fluorescent dye.
    Type: Grant
    Filed: October 15, 2002
    Date of Patent: August 5, 2008
    Assignee: Applera Corporation
    Inventors: Kathleen M. Perry, Robert E. Ruhfel, Sandra L. Spurgeon, Peter Ma
  • Publication number: 20070258277
    Abstract: A matchline sense circuit for detecting a rising voltage on a matchline of a CAM array is disclosed. The circuit initially precharges a matchline to ground before turning on a current source to supply current to the matchline and raise the voltage of the matchline. A reference matchline sense circuit generates a self-timed control signal to keep the current supply turned on for a predetermined duration of time. Sensed data on the matchlines are latched after the current source is turned off and the matchlines are precharged to ground. Because the matchline sense circuit of the present invention precharges the matchlines to ground instead of the supply voltage, VDD, less power is consumed. By sensing the rise of the matchline voltage to an n-channel transistor threshold potential, the matchline sensing operation speed is increased.
    Type: Application
    Filed: July 9, 2007
    Publication date: November 8, 2007
    Inventors: Stanley Ma, Peter Ma, Valerie Lines, Peter Gillingham, Robert McKenzie, Abdullah Ahmed
  • Publication number: 20070036844
    Abstract: A method for forming a porous three-dimensional (3-D) object includes creating a mold from a negative replica of the 3-D object, the 3-D object having a first size and at least one predetermined feature, and then casting a flowable material into and/or onto the mold. The method further includes forming pores of a second size and/or a third size in the flowable material, thereby forming the porous 3-D object.
    Type: Application
    Filed: July 31, 2006
    Publication date: February 15, 2007
    Inventors: Peter Ma, Victor Chen
  • Publication number: 20060256601
    Abstract: A multiple matchline sense circuit for detecting a single, more than one, or no match conditions during a search-and-compare operation of a content addressable memory is disclosed. The circuit compares the rising voltage rate of a multiple matchline to the rising voltage rate of a reference multiple matchline in order to generate a multibit result representing one of the three conditions. The circuit generates a self-timed control signal to end the search-and-compare operation, and to set the circuit to a precharge state.
    Type: Application
    Filed: July 24, 2006
    Publication date: November 16, 2006
    Applicant: MOSAID TECHNOLOGIES INCORPORATED
    Inventors: Stanley MA, Peter MA
  • Publication number: 20060259283
    Abstract: Methods for performing a dynamic analysis of complex systems are described. The dynamic analysis of complex systems is performed by sub-structuring of the system into a plurality of sub-structures. The sub-structures and the interfaces between the sub-structures are modelled using a generalised eigenvector analysis of a discretised model of a full system or a subassembly thereof comprising at least two sub-structures. The sub-structures then are combined at the interfaces into a combined system. The combined system then is solved. Optionally, selected sub-structures may be reduced. Performing such a dynamic analysis allows studying characteristics such as e.g. vibration and/or acoustical effects in a computational efficient way. Such methods can be applied for optimising designs of such complex systems.
    Type: Application
    Filed: April 14, 2006
    Publication date: November 16, 2006
    Inventors: Marc Brughmans, Peter Mas, Rabah Hadjit, Eike Brechlin, Stijn Donders
  • Publication number: 20060246121
    Abstract: Porous materials and methods for forming them are disclosed. One method for immobilizing micro-particles and/or nano-particles onto internal pore surfaces and/or external pore surfaces of porous materials includes suspending the micro-particles and/or nano-particles in a liquid adapted to swell, soften, and/or deform either the porous materials and/or the particles, thereby forming a liquid-particle suspension. The method further includes adding the suspension to the porous materials; and removing the liquid, thereby forming the porous materials having the micro-particles and/or nano-particles immobilized on the internal pore surfaces and/or the external pore surfaces.
    Type: Application
    Filed: April 25, 2006
    Publication date: November 2, 2006
    Inventors: Peter Ma, Guobao Wei
  • Publication number: 20060141487
    Abstract: In one aspect, there are provided methods of amplifying and sequencing a polynucleotide. In some embodiments, the method includes (a) amplifying the polynucleotide with at least one amplification primer, a processive amplification polymerase, a sequencing primer, a sequencing polymerase, deoxynucleoside triphosphates suitable for template-dependent primer extension, and one or more terminating nucleotides, the incubation being carried out at a first temperature suitable for amplifying the polynucleotide with the processive amplification polymerase; (b) incubating the product of step (a) at a second temperature suitable for forming a plurality of differently-sized extended sequencing primers with the sequencing polymerase; (c) evaluating the extended sequencing primers in order to determine the sequence of the polynucleotide. The reactions at the first and second temperatures can be carried out in a single reaction vessel. In other aspects, compositions and kits for carrying out the methods are also provided.
    Type: Application
    Filed: January 26, 2005
    Publication date: June 29, 2006
    Inventor: Peter Ma
  • Publication number: 20060115644
    Abstract: Modified porous materials are disclosed having interconnected, complexly shaped three-dimensional surfaces. The modification is accomplished by crosslinking the three-dimensional surfaces and/or by coating the three-dimensional surfaces with a layer of a predetermined material. The porous materials are macro structures including at least one of nano-features, micro-features, and combinations thereof. The modifying accomplishes changing surface properties of the porous materials, changing the three-dimensional surfaces, and/or rendering the porous materials substantially stable in a predetermined environment.
    Type: Application
    Filed: November 30, 2004
    Publication date: June 1, 2006
    Inventors: Peter Ma, Xiaohua Liu
  • Publication number: 20060083042
    Abstract: A multiple matchline sense circuit for detecting a single, more than one, or no match conditions during a search-and-compare operation of a content addressable memory is disclosed. The circuit compares the rising voltage rate of a multiple matchline to the rising voltage rate of a reference multiple matchline in order to generate a multibit result representing one of the three conditions. The circuit generates a self-timed control signal to end the search-and-compare operation, and to set the circuit to a precharge state.
    Type: Application
    Filed: November 23, 2005
    Publication date: April 20, 2006
    Inventors: Stanley Ma, Peter Ma
  • Publication number: 20060083041
    Abstract: A matchline sense circuit for detecting a rising voltage on a matchline of a CAM array is disclosed. The circuit initially precharges a matchline to ground before turning on a current source to supply current to the matchline and raise the voltage of the matchline. A reference matchline sense circuit generates a self-timed control signal to keep the current supply turned on for a predetermined duration of time. Sensed data on the matchlines are latched after the current source is turned off and the matchlines are precharged to ground. Because the matchline sense circuit of the present invention precharges the matchlines to ground instead of the supply voltage, VDD, less power is consumed. By sensing the rise of the matchline voltage to an n-channel transistor threshold potential, the matchline sensing operation speed is increased.
    Type: Application
    Filed: November 9, 2005
    Publication date: April 20, 2006
    Inventors: Stanley Ma, Peter Ma, Valerie Lines, Peter Gillingham, Robert McKenzie, Abdullah Ahmed
  • Publication number: 20040072167
    Abstract: A dry composition comprising a nucleotide linked to a fluorescent dye is provided. A method of making a dry composition comprising the step of drying a solution comprising a nucleotide linked to a fluorescent dye is provided. A method is provided for performing a reaction on a nucleic acid substrate comprising: (a) providing a vessel containing a dried composition comprising a nucleotide linked to a fluorescent dye, and (b) adding to the vessel an aqueous solution and the nucleic acid substrate. A kit is provided for determining the sequence of a nucleic acid, the kit comprising a dry composition comprising a nucleotide linked to a fluorescent dye.
    Type: Application
    Filed: October 15, 2002
    Publication date: April 15, 2004
    Inventors: Kathleen M. Perry, Robert E. Ruhfel, Sandra L. Spurgeon, Peter Ma
  • Patent number: 6454796
    Abstract: A bifurcated vascular graft having a tubular trunk with an inner diameter. Tubular limbs having respective inner diameters extend longitudinally from the trunk, and the diameter of at least one of the limbs is unequal to half the trunk diameter. In one embodiment, the graft is flared such that the combined diameters of the limbs exceed the diameter of the trunk. In another embodiment, the graft is tapered such that the diameter of the trunk exceeds the combined diameters of the limbs. In a third embodiment, the limb diameters are unequal to one another.
    Type: Grant
    Filed: May 5, 2000
    Date of Patent: September 24, 2002
    Assignee: Endovascular Technologies, Inc.
    Inventors: Kimberley Barkman, Peter Ma, Richard S. Williams