4. Radiant energy
  5. Invisible radiant energy responsive electric signalling
  6. Infrared responsive

James B. Roulston

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Method and apparatus for determining the location of graduated m

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

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Method and apparatus for measuring the displacement of a radiati

Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent

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Profile ID: LFUS-PAI-P-349114

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