Patents by Inventor Tom WeiLiang Chang

Tom WeiLiang Chang 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).

  • Authentication to facilitate communication with roaming devices
    Patent number: 9049292
    Abstract: In an embodiment, a mobile device that is configured to receive calls on a first telephone network via a first telephone number is configured to receive calls on a second telephone network via a second telephone number. A subscriber interface module (SIM) is installed into the mobile device enabling the mobile device to communicate with the second telephone network. A username, password, and telephone number for the second network are obtained. The mobile device registers the username, password, telephone number for the first network and telephone number for the second network with the first telephone network. A telephone call is received from the first telephone network and a personal identification code is employed to verify the registration.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: June 2, 2015
    Assignee: Cisco Technology, Inc.
    Inventors: Ankit Garg, Lakshmanan Venugopalan, Tom Weiliang Chang, Rahul Malegaonkar, Basava Chandra Mulpuri
  • AUTHENTICATING AND REGISTERING ROAMING MOBILE USERS
    Publication number: 20110207454
    Abstract: In an embodiment, a mobile device that is configured to receive calls on a first telephone network via a first telephone number is configured to receive calls on a second telephone network via a second telephone number. A subscriber interface module (SIM) is installed into the mobile device enabling the mobile device to communicate with the second telephone network. A username, password, and telephone number for the second network are obtained. The mobile device registers the username, password, telephone number for the first network and telephone number for the second network with the first telephone network. A telephone call is received from the first telephone network and a personal identification code is employed to verify the registration.
    Type: Application
    Filed: February 25, 2010
    Publication date: August 25, 2011
    Inventors: Ankit GARG, Lakshmanan Venugopalan, Tom Weiliang Chang, Rahul Malegaonkar, Basava Chandra Mulpuri
  • Providing configuration information to an endpoint
    Patent number: 7627656
    Abstract: Providing configuration information to an endpoint includes receiving at a file server a configuration information request from the endpoint. The configuration information request requests configuration information for the endpoint. The file server establishes whether the endpoint is authorized to receive the configuration information. If the endpoint is not authorized to receive the configuration information, the endpoint is instructed to register to receive the configuration information. A notification that the endpoint is authorized to receive the configuration information is received. The configuration information is provided to the endpoint when the endpoint is authorized to receive the configuration information.
    Type: Grant
    Filed: May 16, 2005
    Date of Patent: December 1, 2009
    Assignee: Cisco Technology, Inc.
    Inventors: Adibettahalli Anand, Qin Chen, Marcio G. Siqueira, Tom WeiLiang Chang