Patents by Inventor Nelson A. Crites

Nelson A. Crites 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).

  • Crack detecting system
    Patent number: 4484132
    Abstract: A crack or rupture-detecting system comprising an electrically-insulating substrate which carries lines of electrically-conducting material formed of small electrically conductive particles which are in electrical contact. The substrate layer may be elastomeric when applied to the object to be protected, but later will crack or rupture if a crack or rupture occurs in the object and layer and thereby separate the particles in the conducting line or lines adjacent the crack or rupture.
    Type: Grant
    Filed: March 9, 1981
    Date of Patent: November 20, 1984
    Inventor: Nelson A. Crites