4. Communications: electrical
  5. Selective
  6. Interrogation response

Ernest M. Hall, Jr.

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Apparatus and method for seismic wave detection

Communications: electrical – Selective – Interrogation response
Patent

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Electrical marine connector

Geometrical instruments
Patent

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Geophone cable splice and method

Electricity: conductors and insulators – Conduits – cables or conductors – Combined
Patent

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Geophone case with improved cable anchor

Electricity: conductors and insulators – Conduits – cables or conductors – Single duct conduits
Patent

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Geophone with damping coil

Communications: electrical – Selective – Interrogation response
Patent

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Profile ID: LFUS-PAI-P-63246

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