Patents by Inventor Jorgen Hartmann

Jorgen Hartmann 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).

  • Locking device for a hearing aid battery chamber
    Patent number: 5386476
    Abstract: A device for a battery chamber (2) in a hearing aid (1) with replaceable battery (3) comprises a locking device for blocking the battery chamber. The locking device comprises a displaceable pin, which can be maneuvered through an opening (7) in the battery chamber by means of a pointed or thin object, e.g. a mandrel-shaped tool or the like.
    Type: Grant
    Filed: August 10, 1993
    Date of Patent: January 31, 1995
    Assignee: GN Danavox A/S
    Inventors: Nikolai Bisgaard, Jorgen Hartmann