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-
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Compensating filters
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Patent number 6,760,451
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Issue date Jul 6, 2004
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Peter Graham Craven
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Compensating filters
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Patent number 5,815,580
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Issue date Sep 29, 1998
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Peter G. Craven
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Surround sound apparatus
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Patent number 5,757,927
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Issue date May 26, 1998
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Trifield Productions Ltd.
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Michael Anthony Gerzon
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Stereophonic signal processor
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Patent number 5,671,287
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Issue date Sep 23, 1997
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Trifield Productions Limited
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Michael Anthony Gerzon
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Compensating filters
-
Patent number 5,627,899
-
Issue date May 6, 1997
-
Peter G. Craven
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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-
-
Compensating filters
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Patent number 5,511,129
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Issue date Apr 23, 1996
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Peter G. Craven
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Sound reproduction systems
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Patent number 4,151,369
-
Issue date Apr 24, 1979
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National Research Development Corporation
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Michael A. Gerzon
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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