4. Photocopying
  5. Contact printing
  6. Light monitoring exposure control

Stephen Olah

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Apparatus for exposing diazo printing plates and the like

Photocopying – Contact printing – Light monitoring exposure control
Patent

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Solar energy module and fresnel lens for use in same

Batteries: thermoelectric and photoelectric – Photoelectric – Cells
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1854869

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