Patents by Inventor Royal F. Alvis

Royal F. Alvis 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: 3995121
    Abstract: A telephone paging system includes a central interconnect station responsive to phoned information for automatically transmitting the caller's verbal message to a designated portable paging receiver. The central station instructs the caller by means of a prerecorded message to provide a brief voice message preceded by touch tone or rotary dial digits identifying the receiver to be paged. The paging code digits and message are both tape-recorded by the central station. If the transmitter is free, the recorded paging code is automatically played back through a decoding circuit responsive to rotary dial clicks as well as touch tones. The output of the decoding circuit keys a radio transmitter which transmits a corresponding code followed by the recorded voice message. The central station employs a plurality of recorders. If one recorder is in operation, an incoming call is transferred to the next recorder. Recordings awaiting access to the transmitter are taken in a predetermined order.
    Type: Grant
    Filed: January 24, 1975
    Date of Patent: November 30, 1976
    Assignees: Royal P. Alvis, Anthony J. Marraccini
    Inventor: Royal F. Alvis