TREA

Sky masks

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Industry

  • CPC
  • G03B11/02
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Parent Industries

GPHYSICS G03Photography G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES ACCESSORIES THEREFOR G03B11/00Filters or other obturators specially adapted for photographic purposes

Current Industry

G03B11/02Sky masks
Industries