Patents by Inventor Sokphal Kchao

Sokphal Kchao 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 assessing available battery life in a rechargeable battery
    Patent number: 5751217
    Abstract: Available battery life of a rechargeable battery is assessed and indicated to a user (300). A temporary load is switched onto a fully charged battery (304, 308) and voltage measurements are taken in both unloaded and loaded conditions (306, 310). The battery's internal impedance is determined (312) based on the measured voltages and is compared to a predetermined threshold (314). The predetermined threshold is set based on a value representing a selected minimum available capacity of the battery. An indicator alerts the user as to the status (316, 318) of the available battery life of the battery.
    Type: Grant
    Filed: February 1, 1996
    Date of Patent: May 12, 1998
    Assignee: Motorola, Inc.
    Inventors: Sokphal Kchao, Robert B. Ford