Patents by Inventor Leonard Harris Sherman

Leonard Harris Sherman 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).

  • Universal serial bus powered battery charger
    Patent number: 6507172
    Abstract: Universal serial bus powered battery charger primarily intended for use in battery powered hand-held and other portable devices to charge the battery or batteries within the battery powered device when the same is connected to a host device, powered hub or a bus powered hub through a universal serial bus (USB) port. The battery charger includes one or more current limits to conform to the universal serial bus current supply limit set in the USB specification. Any of the universal serial bus voltage and current limits may be used to charge batteries in the battery powered device, such as single cell lithium-ion batteries. Various features are disclosed.
    Type: Grant
    Filed: March 19, 2001
    Date of Patent: January 14, 2003
    Assignee: Maxim Integrated Products, Inc.
    Inventor: Leonard Harris Sherman
  • Differential output switching converter with ripple reduction
    Patent number: 6462520
    Abstract: A differential switching converter system is disclosed. The converter system includes a plurality of switching converters having at least first and second converters. The plurality of switching converters is coupled in a differential configuration across an output load. Each converter has at least first and second transistors configured to apply and receive energy to and from an energy storage element. The converter system also includes a controller, which is configured to control the operation of the first and second transistors of each converter. The controller synchronizes turn-on and turn-off of the first transistor in the first converter with that of the first transistor in the second converter. The controller also controls turn-on and turn-off of the second transistors in the first and second converters to provide first and second duty cycles, respectively.
    Type: Grant
    Filed: May 9, 2001
    Date of Patent: October 8, 2002
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Vijay Mangtani, Leonard Harris Sherman
  • Universal serial bus powered battery charger
    Publication number: 20020130638
    Abstract: Universal serial bus powered battery charger primarily intended for use in battery powered hand-held and other portable devices to charge the battery or batteries within the battery powered device when the same is connected to a host device, powered hub or a bus powered hub through a universal serial bus (USB) port. The battery charger includes one or more current limits to conform to the universal serial bus current supply limit set in the USB specification. Any of the universal serial bus voltage and current limits may be used to charge batteries in the battery powered device, such as single cell lithium-ion batteries. Various features are disclosed.
    Type: Application
    Filed: March 19, 2001
    Publication date: September 19, 2002
    Inventor: Leonard Harris Sherman