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Industry

  • CPC
  • G07C2009/00222
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Parent Industries

GPHYSICS G07Checking devices G07CTIME OR ATTENDANCE REGISTERS REGISTERING OR INDICATING THE WORKING OF MACHINES GENERATING RANDOM NUMBERS VOTING OR LOTTERY APPARATUS ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE

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G07C2009/00222by more than one push button
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