4. Electrical audio signal processing systems and devices
  5. Acoustical noise or sound cancellation
  6. Counterwave generation control path

Volkmar Klein

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Apparatus for acoustically improving an environment

Electrical audio signal processing systems and devices – Acoustical noise or sound cancellation – Counterwave generation control path
Reexamination Certificate

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Filter device

Liquid purification or separation – Filter – With flow controller for material being treated
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Filter device

Liquid purification or separation – With repair or assembling means – Removable treatment part with normally disabled flow controller
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Filter device and parts thereof and a method for operating...

Liquid purification or separation – With repair or assembling means – Removable treatment part with normally disabled flow controller
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Non-return valve

Fluid handling – Line condition change responsive valves – Direct response valves
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Profile ID: LFUS-PAI-P-3110791

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