4. Radiant energy
  5. Invisible radiant energy responsive electric signalling
  6. With or including a luminophor

Larry S. Trowsdale

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Borehole survey method and apparatus for drilling substantially

Boring or penetrating the earth – With signaling – indicating – testing or measuring – Tool position direction or inclination measuring or...
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Method and apparatus for indicating the radioactive decay produc

Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
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Profile ID: LFUS-PAI-P-348403

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