4. Communications, electrical: acoustic wave systems and devices
  5. Seismic prospecting
  6. Land-reflection type

William Fehrenkamp

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Method and apparatus for producing programmable selection of mus

Dynamic magnetic information storage or retrieval – General recording or reproducing – Signal switching
Patent

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Motion sensor

Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate

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Telemetry system adapter

Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-reflection type
Patent

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Telemetry system cable

Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-reflection type
Patent

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Profile ID: LFUS-PAI-P-502576

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