Patents by Inventor Alexander C. Knill

Alexander C. Knill 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).

  • Controller circuit
    Patent number: 7023147
    Abstract: A circuit used to control the brightness of a number of light emitting diodes (LEDs) in an array, such that the color and brightness of the light produced by the array may be varied. The circuit is optimized to operate at high efficiency, permitting its use in confined spaces with poor cooling. The circuit permits a variety of configurations of LEDs to be controlled and driven from a range of line voltages. The circuit is further optimized to use few components to achieve its function.
    Type: Grant
    Filed: September 8, 2004
    Date of Patent: April 4, 2006
    Assignee: Pentair Pool Products, Inc.
    Inventors: Edward G. Colby, Alexander C. Knill, Simon A. Shakespeare