Patents by Inventor Charles L. Pruitt

Charles L. Pruitt 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).

  • Patent number: 4095872
    Abstract: The invention is directed to a security device which detects tampering with secured closure. A fiber optic bundle is looped through a closure and secured at opposite ends of the bundle to a collar. After installation, light is passed through the fiber optics and they generate a particular pattern at a viewing end of the collar. If there is any tampering with the enclosure, the individual fiber optics will be disturbed or cut. Subsequent viewing of the fiber optics will generate a different viewing pattern indicating that tampering has occurred.
    Type: Grant
    Filed: January 13, 1977
    Date of Patent: June 20, 1978
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Lorin R. Stieff, Charles L. Pruitt, Reinhard R. Ulrich, Frank S. Houck