Patents by Inventor Milton Phan

Milton Phan 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).

  • Power management system for hybrid fuel cell and battery driven electric vehicles
    Publication number: 20050118472
    Abstract: A power management system includes a fuel cell based primary power supply and a rechargeable cell based secondary power supply and a charging control circuit arranged between the two power supplies. A controller applies a charging control signal to the charging control circuit for controlling the magnitude of a charging current for charging the second power supply. When the output voltage of the first power supply is greater than that of the second power supply, the charging control signal controls the charging current in accordance with a predetermined threshold of the output voltage of the second power supply. A switching circuit is arranged between the first power supply and the second power supply for selectively allowing the output voltage of the second power supply to be fed, together with the output voltage of the first power supply, to an external load, when the output voltage of the second power supply is greater than a predetermined level.
    Type: Application
    Filed: November 30, 2004
    Publication date: June 2, 2005
    Inventors: Jefferson Yang, Edward Johnson, Milton Phan, Bo-Ching Hsu