Patents by Inventor William M. Henehan

William M. Henehan 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).

  • Device for rotating hanging plant and indicating dryness
    Patent number: 5315784
    Abstract: A device for rotating a hanging plant to keep it from growing lopsided. The device has counteracting coaxial tension springs of opposite hand that rotate the plant first in one direction when the plant is watered and then in the opposite direction as the plant goes from wet to dry. A weight change of 10-20% is sufficient to rotate the plant at least 1/2 turn. An indicator is responsive to changes in the length of the springs as the plant dries out and as the springs are axially unloaded.
    Type: Grant
    Filed: November 9, 1992
    Date of Patent: May 31, 1994
    Inventor: William M. Henehan