Patents by Inventor Arthur Stewart Bell

Arthur Stewart Bell 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).

  • System for monitoring dialled telephone numbers
    Patent number: 4013839
    Abstract: A system for monitoring dialled numbers is disclosed which provides a subscriber with a record of numbers dialled over his telephone line or lines. The system provides a monitoring unit inductively coupled to each line which tapes the dial pulses as they are dialled. Aslo included is a control processing unit which processes the individual tapes to provide a written record. The system thus eliminates the need for duplicating costly equipment such as discriminators and printers at each line.
    Type: Grant
    Filed: November 8, 1974
    Date of Patent: March 22, 1977
    Assignee: Telstop S.A.
    Inventor: Arthur Stewart Bell