Patents by Inventor Clifton Liu

Clifton Liu 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).

  • Dynamic carrier switching
    Patent number: 9271208
    Abstract: A rule server detects a condition pertaining to a switch of a user device to a preferred wireless carrier, and sends a message to the user device indicating a switch to the preferred wireless carrier.
    Type: Grant
    Filed: December 16, 2013
    Date of Patent: February 23, 2016
    Assignee: Amazon Technologies, Inc.
    Inventors: Subram Narasimhan, Girish Bansilal Bajaj, Siva Rama Kumar Somayajula, Clifton Liu, Varadarajan Gopalakrishnan
  • Single version of a user device modem for use with different wireless carriers
    Patent number: 9020479
    Abstract: A user device determines a current subscriber identity module (SIM) profile, identifies a modem profile that corresponds to the current SIM profile, and updates a non-volatile memory of a modem with the identified modem profile.
    Type: Grant
    Filed: February 18, 2010
    Date of Patent: April 28, 2015
    Assignee: Amazon Technologies, Inc.
    Inventors: Siva Rama Kumar Somayajula, Clifton Liu, Kenneth P. Kiraly, Varadarajan Gopalakrishnan, Jay P. Desai, Subram Narasimhan
  • World SIM
    Patent number: 8965366
    Abstract: A user device obtains a device profile corresponding to a primary wireless network at a current location of the user device, reprograms a modem of the user device using the device profile corresponding to the primary wireless network at the current location of the user device, and establishes a network connection using the device profile corresponding to the primary wireless network at the current location of the user device.
    Type: Grant
    Filed: February 18, 2010
    Date of Patent: February 24, 2015
    Assignee: Amazon Technologies, Inc.
    Inventors: Siva Rama Kumar Somayajula, Clifton Liu, Kenneth P. Kiraly, Varadarajan Gopalakrishnan, Jay P. Desai, Subram Narasimhan
  • DYNAMIC CARRIER SWITCHING
    Publication number: 20140106753
    Abstract: A rule server detects a condition pertaining to a switch of a user device to a preferred wireless carrier, and sends a message to the user device indicating a switch to the preferred wireless carrier.
    Type: Application
    Filed: December 16, 2013
    Publication date: April 17, 2014
    Inventors: Subram Narasimhan, Girish Bansilal Bajaj, Siva Rama Kumar Somayajula, Clifton Liu, Varadarajan Gopalakrishnan
  • Dynamic carrier switching
    Patent number: 8626165
    Abstract: A rule server detects a condition pertaining to a switch of a user device to a preferred wireless carrier, and sends a message to the user device indicating a switch to the preferred wireless carrier.
    Type: Grant
    Filed: February 18, 2010
    Date of Patent: January 7, 2014
    Assignee: Amazon Technologies, Inc.
    Inventors: Subram Narasimhan, Girish Bansilal Bajaj, Siva Rama Kumar Somayajula, Clifton Liu, Varadarajan Gopalakrishnan
  • Universal serial bus low power idle mode
    Patent number: 8452995
    Abstract: An idle universal serial bus (“USB”) is placed into a low power mode. During low power mode, peripherals attached to the USB bus may also enter a low power mode. While in this low power mode, USB attached peripherals may retain some functionality. For example, a USB attached modem may remain connected, allowing rapid resumption of communications upon awakening.
    Type: Grant
    Filed: December 29, 2009
    Date of Patent: May 28, 2013
    Assignee: Amazon Technologies, Inc.
    Inventors: Manish Lachwani, Clifton Liu, Kenneth P. Kiraly, David Berbessou