4. Acoustics
  5. Auditorium

Ronald R. Freiheit

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Acoustic cabinet

Acoustics – Sound-modifying means – Housing or enclosure
Reexamination Certificate

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Acoustical virtual environment

Acoustics – Auditorium
Patent

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Active acoustics performance shell

Acoustics – Sound-modifying means – Sound absorbing panels
Reexamination Certificate

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Cabinet grille

Design Patent

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Profile ID: LFUS-PAI-P-569263

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