Patents by Inventor Meilissa Rui Ming Lum

Meilissa Rui Ming Lum 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).

  • Method and apparatus for current sharing ethernet power across four conductor pairs
    Patent number: 7474704
    Abstract: Methods and apparatus for delivering power down all conductors of an Ethernet connection are disclosed. Embodiments include control circuitry coupled to both conductor of an Ethernet cable. The control circuitry is configured to sense the current flowing through power switches coupled inline with the respective conductors and control the switch in order to maintain the current flow through the power switch below a predetermined level. The circuitry prevents Ethernet ports from being shutting down due to conditions caused by imbalances in the effective resistance of Ethernet conductors and circuit paths.
    Type: Grant
    Filed: March 16, 2005
    Date of Patent: January 6, 2009
    Assignee: Cisco Technology, Inc.
    Inventors: Meilissa Rui Ming Lum, Roger Karam