Patents by Inventor Cynthia M. Butler

Cynthia M. Butler 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).

  • Misting and watering system controller with light sensistive detector
    Patent number: 5647388
    Abstract: System and method for supplying water to plants. A photodetector detects light adjacent the plants and a threshold circuit generates a first signal representative of a first state when the level of illumination of the detected light is less than a threshold level and generates a second signal representative of a second state when the level of illumination of the detected light is greater than the threshold level. A processor is responsive to the first and second signals for anticipating approximately when the detected light will next change from the first state to the second state and approximately when the detected light will next change from the second state to the first state. A counter circuit responsive to the processor generates an initiate signal and a terminate signal.
    Type: Grant
    Filed: November 13, 1995
    Date of Patent: July 15, 1997
    Assignee: Phytotronics, Inc.
    Inventors: James R. Butler, Jr., Cynthia M. Butler, Robert E. Cobb