Patents by Inventor Ravikumar Padmanabham

Ravikumar Padmanabham 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).

  • Cellular telephone with text telephone functionality and method thereof
    Publication number: 20040137944
    Abstract: A radio communication device (102) provides for full TTY functionality by providing TTY capture (526) and TTY mapping (528) that allows the communication device (102) to transmit and receive TTY data. An external keyboard (108) provides for additional ease of use in TTY character entry. A method is also provided for the communication device (102) to transmit and receive TTY data. Optionally, a keyboard detection circuit can detect if the external keyboard (108) is connected to the radio communication device (108) and if so, transmit any TTY data that has been entered, or alternatively if no keyboard is connected, send the TTY data to a connector (510) so that the data can be sent to an external TTY.
    Type: Application
    Filed: January 15, 2003
    Publication date: July 15, 2004
    Inventors: Jimmy Zhi-Ming Lee, Danilo Ong Tan, Ravikumar Padmanabham