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

Charles E. Foerster, Jr.

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Float detection system

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

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Method and apparatus for calibrating flow meters

Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...
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Method and apparatus for electronic leak testing

Boots – shoes – and leggings
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Profile ID: LFUS-PAI-P-748127

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