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Footage volume control circuit
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Patent number 4,244,260
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Issue date Jan 13, 1981
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Norlin Industries, Inc.
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Alberto Kniepkamp
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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Rhythm accent circuit
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Patent number 4,183,277
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Issue date Jan 15, 1980
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Norlin Industries, Inc.
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Alberto H. Kniepkamp
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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Bass signal control circuit
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Patent number 3,986,425
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Issue date Oct 19, 1976
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Norlin Music, Inc.
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Alberto Kniepkamp
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G10 - MUSICAL INSTRUMENTS ACOUSTICS