TREA

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Industry

  • CPC
  • A63J5/10
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Parent Industries

AHUMAN NECESSITIES A63Sports, games A63JDEVICES FOR THEATRES, CIRCUSES, OR THE LIKE CONJURING APPLIANCES OR THE LIKE A63J5/00Auxiliaries for producing special effects on stages, or in circuses or arenas

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A63J5/10Arrangements for making visible or audible the words spoken
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