Patents by Inventor Charles L. R. Robb

Charles L. R. Robb 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).

  • Patent number: 5902166
    Abstract: A multi-colored LED biasing circuit that allows users to selectively choose the colors for a given state or condition. A user will assign by use of switches which color of a multi-colored LED will light on the presence of an electronic signal representing a state or condition in need of a visual output. One embodiment for a tri-colored LED will allow a user to select a base color for when no signal is present, the base color selected between a first color, and a second color and a secondary color for when a signal is present, the secondary color selected between the opposite of the base color (first or second color) and a third color. The present invention can be embodied in toys in a variety of ways. For example, dolls and other figurines having eyes that can change color to represent a change of state or condition in the figurine for enhanced play or decorative purposes.
    Type: Grant
    Filed: April 10, 1997
    Date of Patent: May 11, 1999
    Inventor: Charles L. R. Robb
  • Patent number: 5619182
    Abstract: A multi-colored LED biasing circuit that allows users to selectively choose the colors for a given state or condition. A user will assign by use of switches which color of a multi-colored LED will light on the presence of an electronic signal representing a state or condition in need of a visual output. One embodiment for a tri-colored LED will allow a user to select a base color for when no signal is present, the base color selected between a first color, and a second color and a secondary color for when a signal is present, the secondary color selected between the opposite of the base color (first or second color) and a third color. The invention is also embodied as a secondary flasher/brake indicator for automobiles that can be embodied in a number of different forms such as a stick shift knob having indication areas, a figurine having suction cup mounting means or hanging means for placement within the vehicle, or an integrated rear view mirror having indication areas lit by multi-colored LEDs.
    Type: Grant
    Filed: January 18, 1996
    Date of Patent: April 8, 1997
    Inventor: Charles L. R. Robb