Patents by Inventor John E. Darling

John E. Darling 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).

  • Moisture presence alarm system
    Patent number: 4965554
    Abstract: A moisture presence alarm system has a sensor system which extends over an area to monitored and a detector device which receives signals from the sensor system. This has spatially separated conductors in contact with a moisture absorbent material. The position of the leak is determined by selective interrogation of pairs of conductors. The conductors may be in an orthogonal matrix (A1 . . . X1 . . . A2 . . . X2), each conductor (10,11) being associated with a moisture absorbent strip (12,13).
    Type: Grant
    Filed: January 19, 1990
    Date of Patent: October 23, 1990
    Inventor: John E. Darling