Patents by Inventor James A. Kramer, Jr.

James A. Kramer, Jr. 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).

  • Solar rechargeable lantern
    Patent number: 6290367
    Abstract: A rechargeable solar lantern with an improved power control circuit. The power control circuit includes a first switch, actuated by the connection of the solar panel to the battery, to prevent power from being supplied to the light bulb when the battery is charging. The power control circuit also includes a second switch to prevent power from being supplied to the light bulb when the voltage falls below a predetermined unacceptable level. Preferably, the second switch remains tripped until reset by the actuation of the first switch, indicating that the battery is being recharged.
    Type: Grant
    Filed: November 11, 1999
    Date of Patent: September 18, 2001
    Assignee: Light Corp.
    Inventors: William J. Greenhoe, James A. Kramer, Jr., James F. Wolter