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

John W. Ramsden, Jr.

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Control system for longwall shearer

Mining or in situ disintegration of hard material – Automatic control; signaling or indicating – Of hard material disintegrating machine
Patent

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Radiation sensor

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

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System for controlling cutting horizons for continuous type...

Mining or in situ disintegration of hard material – Automatic control; signaling or indicating – Ore/rock interface determination during cutting
Reexamination Certificate

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Profile ID: LFUS-PAI-P-150330

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