Patents by Inventor David I. Abbott

David I. Abbott 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).

  • Sheltered housing scheme communications system
    Patent number: 4881252
    Abstract: A sheltered housing scheme communications system is provided. The system includes a master unit carried by a warden which is able to receive and initiate outside telephone calls. This is accomplished by inserting the master unit into a system cable which controls an auto dialer. The auto dialer is capable of dialing a non-preprogrammed telephone number by operation of the master unit. The master unit also functions to indicate its availability to answer an incoming call to the central control unit.
    Type: Grant
    Filed: June 15, 1988
    Date of Patent: November 14, 1989
    Assignee: Tunstall Telecom Limited
    Inventors: David Jones, David I. Abbott