Surgery – Truss – Pad
Patent
1988-07-20
1990-06-26
Jaworski, Francis
Surgery
Truss
Pad
1284205, 600 25, 600 27, 600 12, 381 68, A61N 100
Patent
active
049363050
ABSTRACT:
A shielded magnetic assembly for use in a magnetic hearing aid is described. The shielded assembly uses a disc-shaped magnet with a high permeability, low coercivity material placed on the face of the magnet away from the air gap. Preferably, the shielding material also covers portions of the edge of the magnet to form a cap. The shielding focuses the magnet's energy into the air gap to improve coupling and reduce interference from external magnetic fields.
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R. Goode and T. Glattke, Audition via Electromagnetic Induction, Arch Otolaryngol, Jul., 1973, pp. 23-26.
R. Goode, An Implantable Hearing Aid, Tr. Am. Acad. Opth. & Otol., Jan.-Feb., 1970, pp. 128-139.
J. Vernon, T. Mahoney and A. Schlevning II, Implantable Hearing Aids, pp. 249-268.
J. Fredrickson, D. Tomlinson, E. Davis and L. Odkvist, Evaluation of an Electromagnetic Implantable Hearing Aid, Canadian Journal of Otolaryngology, vol. 2, No. 1, 1973, pp. 53-62.
Ashtiani Cyrus N.
Cendes Zoltan J.
Jaworski Francis
Manuel George
Richards Medical Company
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