4. Acoustics
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Open-ended seismic source

Acoustics – Geophysical or subsurface exploration – Seismic wave generation
Patent

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Optical device for monitoring critical speeds of a rotating memb

Acoustics – Wave generation
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Optical seismograph

Acoustics – Geophysical or subsurface exploration – Seismic wave detection
Patent

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Optimal shadow omniphonic microphone and loudspeaker system

Acoustics – Plural diaphragm sound sources
Patent

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Optimized diesel engine exhaust silencer

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

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Optimized loudspeaker transducer monuting system

Acoustics – Sound-modifying means – Housing or enclosure
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Optimum edges for speakers and musical instruments

Acoustics – Sound-modifying means – Intensifying horn
Reexamination Certificate

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Oscillation absorber for the absorption of structure-borne sound

Acoustics – Sound-modifying means – Mechanical vibration attenuator
Patent

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Outdoor speaker

Acoustics – Plural diaphragm sound sources – Plural chambers
Patent

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Outer tube of exhaust system part

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

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Outlet silencer and heat recovery structures for gas turbine

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

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Oval dome type speaker

Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent

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Oval shaped spark arresting muffler for engines

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

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Overhead sound attenuating cover for roadways and railways

Acoustics – Sound-modifying means – Sound absorbing fence or screen
Patent

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Overhead speaker system for use in vehicles

Acoustics – Combined
Patent

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