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Drum with modulated acoustic air vent

Music – Instruments – Drums
Reexamination Certificate

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Drum with modulated acoustical air vent

Music – Instruments – Drums
Reexamination Certificate

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Drum with shell less susceptible to influence from drum stand

Music – Instruments – Drums
Patent

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Drum-mounted striker-type percussion attachment

Music – Instruments – Rigid vibrators
Reexamination Certificate

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Drumhead

Music – Instruments – Drums
Reexamination Certificate

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Drumhead

Music – Instruments – Drums
Patent

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Drumhead

Music – Instruments – Drums
Reexamination Certificate

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Drumhead and muting structure for acoustic and electronic...

Music – Instruments – Drums
Reexamination Certificate

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Drumhead and muting structure for acoustic and electronic...

Music – Instruments – Drums
Reexamination Certificate

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Drumhead and tensioning apparatus

Music – Instruments – Drums
Reexamination Certificate

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Drumhead construction

Music – Instruments – Drums
Patent

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Drumhead dampening device

Music – Instruments – Drums
Reexamination Certificate

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Drumhead deadening device

Music – Instruments – Drums
Patent

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Drumhead material and method

Music – Instruments – Drums
Reexamination Certificate

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Drumhead quick disconnect

Music – Instruments – Drums
Reexamination Certificate

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Drumhead ring reducer

Music – Instruments – Drums
Patent

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Drumhead tensioning device and method

Music – Instruments – Drums
Reexamination Certificate

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Drumhead tensioning device and method

Music – Instruments – Drums
Reexamination Certificate

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Drumhead tensioning device and method

Music – Instruments – Drums
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Drumhead tensioning device and method

Music – Instruments – Drums
Reexamination Certificate

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