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

Gunter H. Hatje

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Method and system for optically testing sawn timber for faults

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

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Retroreflector for the reflection of electromagnetic rays

Communications: directive radio wave systems and devices (e.g. – Clutter elimination – Mti
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Profile ID: LFUS-PAI-P-815898

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