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Pipe organ valve
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Patent number 4,704,937
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Issue date Nov 10, 1987
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Paul A. Klann
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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Organ drawknob
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Patent number 4,615,254
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Issue date Oct 7, 1986
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Paul A. Klann
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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Heating model
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Patent number 4,457,296
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Issue date Jul 3, 1984
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Paul A. Klann
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F24 - HEATING RANGES VENTILATING
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Pedalboard
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Patent number 4,278,004
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Issue date Jul 14, 1981
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Paul A. Klann
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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Optical distortion device
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Patent number 4,159,872
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Issue date Jul 3, 1979
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Paul A. Klann
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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Organ pedal board
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Patent number 4,151,774
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Issue date May 1, 1979
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Paul A. Klann
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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-
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Optical distortion device
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Patent number 3,967,898
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Issue date Jul 6, 1976
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Paul A. Klann
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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Valve for pipe organs
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Patent number 3,967,522
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Issue date Jul 6, 1976
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Paul A. Klann
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G10 - MUSICAL INSTRUMENTS ACOUSTICS