4. Communications: electrical
  5. Condition responsive indicating system
  6. Specific condition

Robert C. Hanrahan

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Electrical contact avoidance device

Communications: electrical – Condition responsive indicating system – Specific condition
Patent

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Instrument for measuring levels of concentration of tritium and

Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent

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Wood pole decay detector

X-ray or gamma ray systems or devices – Specific application – Absorption
Patent

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Profile ID: LFUS-PAI-P-667036

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