Patents by Inventor Richard K. St. John

Richard K. St. John 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).

  • Telephone interface security device
    Patent number: 4825466
    Abstract: A telephone multiple pair network interface device provides a demarcation between the wiring owned by the telephone company and that owned by the customer. Security means are provided to prevent unauthorized access to the interface by other than the customer. Separate means are provided such that the telephone company has the ability to override the security means to permit testing or service of the telephone lines.
    Type: Grant
    Filed: August 7, 1987
    Date of Patent: April 25, 1989
    Assignee: GTE Products Corporation
    Inventors: David H. Dowler, Richard K. St. John