Patents by Inventor Thomas Chu

Thomas Chu 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: 20050068942
    Abstract: Establishing voice calls in an IP based VPN includes determining the relative location of a terminating point with respect to an originating point of a new communication containing the voice data, determining one or more IP addresses to egress the communication from the originating point to the terminating point, creating a VPN identifier in the new communication, passing the new communication to the terminating point and removing the VPN identifier from the new communication. The VPN identifier can be an extra field added to an encapsulation coding scheme of the voice data.
    Type: Application
    Filed: September 30, 2003
    Publication date: March 31, 2005
    Inventors: Thomas Chu, Martin Glapa, Francis Magee, Steven Richman
  • Patent number: 6828809
    Abstract: Various methods of hot-electron imaging a workpiece are provided. In one aspect, a method of examining a workpiece is provided that includes directing a first photon at a photodetector at a first known time and stimulating a circuit device of the workpiece at a second known time to produce a condition in the circuit device conducive to photon emission. At least one photon emitted by the circuit device in response to the stimulation is detected. The first photon increases the quantum efficiency of the photodetector in detecting the at least one photon. The detection of the at least one photon relative to the first known time and the second known time is time correlated to temporally distinguish the first photon and the at least one photon and to temporally correlate the stimulation of the circuit device to the detection of the at least one photon.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: December 7, 2004
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Michael R. Bruce, Robert Powell, Brennan Davis, Rama Goruganthu, Thomas Chu, Miguel Santana, Jr.
  • Patent number: 6780664
    Abstract: Various microscopy probes and methods of fabricating the same are provided. In one aspect, a method of fabricating a microscopy probe is provided that includes providing a member and forming a first film on the member. The first film fosters growth of carbon nanotubes when exposed to a carbon-containing compound. A second film is formed on the first film. The second film has an opening therein that exposes a portion of the first film. A carbon nanotube is formed on the exposed portion of the first film.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: August 24, 2004
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Rama R. Goruganthu, Michael R. Bruce, Thomas Chu, Miguel Santana, Jr., Robert Powell
  • Patent number: 6377590
    Abstract: An apparatus (30) and method minimize voice delay by combining comfort noise with subframe insertions to fill gaps in speech and maintain a minimum delay for packets arriving late. When a packet is late, short durations of sound are repetitively inserted until the late packet arrives. When the late packet finally arrives, the durations of future speech pauses are modified so there is no voice degradation.
    Type: Grant
    Filed: June 1, 1998
    Date of Patent: April 23, 2002
    Assignee: Motorola, Inc.
    Inventors: Thomas Jake Hoppal, Thomas Chu, Murali Ranganathan, Darryl Sale