Patents by Inventor Raymond J. Rhine

Raymond J. Rhine 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).

  • Optical key security access system
    Patent number: 5283431
    Abstract: An access security system employs a non-duplicatable key made from an optically transmissive material having gradient refractive index and diffusive properties which provide the material with a non-duplicatable quality. The system provides a high level of security comparable to many biometric systems and is well suited for use in the prevention of unauthorized access to high security areas.
    Type: Grant
    Filed: February 4, 1992
    Date of Patent: February 1, 1994
    Inventor: Raymond J. Rhine