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

Kenshu Watanabe

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Condenser microphone having resistance against high-temperature

Acoustics – Diaphragm – Microphone type
Patent

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Method of detecting liquid leakage

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

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System and method of confirming operation of a steam relieving s

Fluid handling – With indicator – register – recorder – alarm or inspection means – Fluid pressure responsive indicator – recorder or alarm
Patent

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Profile ID: LFUS-PAI-P-1041866

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