4. Communications: electrical
  5. Selective
  6. Having electron beam device

H. A. Birmiel

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Acoustic transmitter

Acoustics – Geophysical or subsurface exploration – Seismic wave generation
Patent

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Acoustic velocity logging system

Communications: electrical – Selective – Having electron beam device
Patent

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Automatic gain control circuit and method

Amplifiers – Signal feedback – Variable impedance in feedback path varied by separate...
Patent

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Automatic gain control for seismometer recorders

Communications: electrical – Selective – Having electron beam device
Patent

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Cable depth control apparatus

Communications: electrical – Selective – Having indication or alarm
Patent

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Profile ID: LFUS-PAI-P-298478

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