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Hearing protector
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Patent number 5,631,965
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Issue date May 20, 1997
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Joseph S. Chang
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Speech processing method and apparatus
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Patent number 4,515,158
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Issue date May 7, 1985
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The Commonwealth of Australia Secretary of Industry and Commerce
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James F. Patrick
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Speech processor
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Patent number 4,441,202
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Issue date Apr 3, 1984
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The University of Melbourne
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Yit C. Tong
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Prosthesis
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Patent number 4,267,410
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Issue date May 12, 1981
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The University of Melbourne
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Ian C. Forster
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE