Patents by Inventor Zafarul Azam

Zafarul Azam 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).

  • Antenna adapted to operate in a plurality of frequency bands
    Patent number: 6611691
    Abstract: A novel retractable antenna which enables dual-band operation in two different positions of the antenna is described. Further, the novel retractable antennas are couple to a variety matching circuit arrangements according to various embodiments of the present disclosure to eliminates the use of electrical or mechanical switching of two different matching circuits.
    Type: Grant
    Filed: December 24, 1998
    Date of Patent: August 26, 2003
    Assignee: Motorola, Inc.
    Inventors: Guangping Zhou, Michael J. Kuksuk, Robert Kenoun, Zafarul Azam
  • Method for demand channel change for a radio telephone
    Patent number: 6167260
    Abstract: A radiotelephone system (100) includes a radiotelephone (102) and a central device (104) that communicate via radio frequency (RF) signals. The radiotelephone (102) includes a user interface (114) which permits the user to request a channel change by the central device. A signal is communicated to the user if a channel change is denied. A channel scan can be conducted by the radiotelephone to identify a new channel.
    Type: Grant
    Filed: January 31, 1996
    Date of Patent: December 26, 2000
    Assignee: Motorola, Inc.
    Inventors: Zafarul Azam, Douglas W. Main