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Double-walled tail pipe for an exhaust pipe of a motor...

Acoustics – Sound-modifying means – Muffler – fluid conducting type
Reexamination Certificate

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Draining device for muffler of small planing boat

Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent

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Draining device used in a car-muffler

Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent

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Dry cooled jet aircraft runup noise suppression system

Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent

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Dual cross-flow muffler

Acoustics – Sound-modifying means – Muffler – fluid conducting type
Reexamination Certificate

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Dual entry plug muffler

Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent

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Dual flow turbine engine muffler

Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent

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Dual frequency side branch resonator

Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent

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Duct and process for producing the same

Acoustics – Sound-modifying means – Muffler – fluid conducting type
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Duct for reducing shock related noise

Acoustics – Sound-modifying means – Muffler – fluid conducting type
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Duct silencer

Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent

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Duct wall structure

Acoustics – Sound-modifying means – Muffler – fluid conducting type
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Ductless acoustical noise attenuator

Acoustics – Sound-modifying means – Muffler – fluid conducting type
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