4. Communications: electrical
  5. Wellbore telemetering or control
  6. Selective control of subsurface equipment

J. W. Eldred

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Acoustic field transducers

Communications – electrical: acoustic wave systems and devices – Signal transducers
Patent

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Acoustic transducer

Communications – electrical: acoustic wave systems and devices – Signal transducers – Receivers
Patent

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Acoustic transducer and method of making the same

Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent

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Aquatic transducer system

Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent

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Cockpit vision and protection apparatus

Aeronautics and astronautics – Aircraft structure – Details
Patent

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Profile ID: LFUS-PAI-P-242858

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