4. Music
  5. Instruments
  6. Drums

Steven Powers

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Methods and pressure vessels for solid-state microcellular...

Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – By gas forming or expanding
Reexamination Certificate

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Variable tensioning mechanism for drum head

Music – Instruments – Drums
Patent

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Profile ID: LFUS-PAI-P-1748674

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