Patents by Inventor B. Chester Hwang

B. Chester Hwang 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).

  • Circuit for enhancing power delivery of an energy source
    Patent number: 5714863
    Abstract: The power delivery of an energy source (10) is enhanced by a dual function circuit. The circuit utilizes a storage capacitor (32) to store a voltage higher than the source voltage by transferring charge from the energy source to the storage capacitor between current pulses (16), than transferring charge from the storage capacitor to the load during current pulses. This is achieved by the novel combination of a boost converter (40) operating in conjunction with a buck converter (45).
    Type: Grant
    Filed: February 20, 1996
    Date of Patent: February 3, 1998
    Assignee: Motorola, Inc.
    Inventors: B. Chester Hwang, Ashok Ramakant Patil
  • Modular battery pack
    Patent number: 5573869
    Abstract: A modular battery pack (10) is described having several embodiments. In general, the modular battery pack has a battery cell cartridge (12), a circuit cartridge (14), and a housing (16). In conventional battery packs these three elements are combined into one single unit. The invention modularizes these components such that portions may be re-used and shared. This results in a more cost effective power system for a portable electrical or electronic device (40) since, once the battery cell or cells (48) have expired, they can be replaced without having to replace the other components, in particular the circuitry.
    Type: Grant
    Filed: April 22, 1996
    Date of Patent: November 12, 1996
    Assignee: Motorola, Inc.
    Inventors: B. Chester Hwang, Jose M. Fernandez, Vernon Meadows, Simon Thomas
  • Modular battery pack
    Patent number: 5534366
    Abstract: A modular battery pack (10) is described having several embodiments. In general, the modular battery pack has a battery cell cartridge (12), a circuit cartridge (14), and a housing (16). In conventional battery packs these three elements are combined into one single unit. The invention modularizes these components such that portions may be reused and shared. This results in a more cost effective power system for a portable electrical or electronic device (40) since, once the battery cell or cells (48) have expired, they can be replaced without having to replace the other components, in particular the circuitry.
    Type: Grant
    Filed: November 22, 1995
    Date of Patent: July 9, 1996
    Assignee: Motorola, Inc.
    Inventors: B. Chester Hwang, Jose M. Fernandez, Vernon Meadows, Simon Thomas, Willard F. Amero, Jr.