4. Radiant energy
  5. Photocells; circuits and apparatus
  6. Optical or pre-photocell system

Peng-Ching Peng

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Device for detecting position of steel bar in structure and...

X-ray or gamma ray systems or devices – Specific application – Absorption
Reexamination Certificate

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Method and apparatus for examining corrosion of tendon...

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate

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Method for examining defect in steel bar and apparatus therefor

X-ray or gamma ray systems or devices – Specific application – Absorption
Reexamination Certificate

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Profile ID: LFUS-PAI-P-3155202

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