Patents by Inventor Andrea Woo, legal representative

Andrea Woo, legal representative 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).

  • Two-way RF ranging system and method for local positioning
    Patent number: 7286624
    Abstract: A positioning system includes a plurality of devices configured to exchange RF signals with one another. A first device periodically receives a message from each other device during time slots assigned them. The received message includes information representing a time of arrival at the other device of a respective message transmitted by the first device. A time of arrival of the message from each of the other devices is determined by the first device. The first device periodically transmits messages to the other devices, each transmitted message including information representing the determined time of arrival for at least one of the other devices. A range from the first device to each of a plurality of the other devices is determined as function of the determined time of arrival of the message from the other device and the time of arrival information in the message from the other device.
    Type: Grant
    Filed: July 3, 2003
    Date of Patent: October 23, 2007
    Assignee: Navcom Technology Inc.
    Inventors: Andrea Woo, legal representative, Russell Woo, legal representative, Mark Lindsay Rentz, Scott Adam Stephens, Mark Phillip Kaplan, Richard Kai-Tuen Woo, deceased