Patents by Inventor Reginald A. Hunn

Reginald A. Hunn 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).

  • Waterproofing of insulated electric cables
    Patent number: 4326094
    Abstract: The invention provides for the waterproofing of a telephone cable by the incorporation of longitudinal strands within the sheath alongside the insulated conductors. The strands have deposited thereon a moisture sensitive swelling agent, such as ethyl hydrogen cellulose, and in the event of the sheath rupturing and the conductors being exposed to moisture the swelling agent on the strands reacts with the moisture rapidly forming a plug which prevents further ingress of the moisture.
    Type: Grant
    Filed: November 19, 1979
    Date of Patent: April 20, 1982
    Assignee: South African Inventions Development Corporation
    Inventor: Reginald A. Hunn