Patents by Inventor N Bertil E. Tindberg

N Bertil E. Tindberg 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).

  • Device for closing a curved duct
    Patent number: 4920985
    Abstract: A device for closing a curved duct, especially an ear protector for insertion in the auditory canal (4) of the ear, consists of an elastic rod-shaped body (1), e.g. of foamed plastic, which is pointed at one end and the cross-sectional area of which is larger than that of the auditory canal. The pointed end of the rod-shaped body is considerably offset with respect to the longitudinal direction of the body so as to form a lip (5) which is unsymmetrical in relation to the longitudinal direction of the body and capable of conforming to the curved portion of the auditory canal when the rod-shaped body is inserted therein.
    Type: Grant
    Filed: September 19, 1988
    Date of Patent: May 1, 1990
    Assignee: Peltor AB
    Inventor: N Bertil E. Tindberg