Special double-color ten-bead no-girder combined abacus for infant

Special double-color ten-bead no-girder combined abacus for infant

  • CN 201,893,044 U
  • Filed: 08/20/2010
  • Issued: 07/06/2011
  • Est. Priority Date: 08/20/2010
  • Status: Active Grant
First Claim
Patent Images

1. the special-purpose no beam of double-colored ten pearl childs makes up abacus, it is characterized in that, comprise the frame around being arranged at, and be fixed in one or more shelves on the described frame, be socketed with at least two group pearls string on the described shelves, described every group of pearl string comprises five pearls, and the bead surface of described two groups of pearls string is provided with the coating of different colours.

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