Title: Foldable noiseless abacus
Application Number: 200520085484 Application Date: 2005.07.22
Publication Number: 000000000 Publication Date:
Approval Pub. Date: 2006.10.04 Granted Pub. Date: 2006.10.04
International Classifi-cation: G06C1/00
Applicant(s) Name: Zhang Min Address:
Inventor(s) Name: Zhang Min
Attorney & Agent:
Abstract:
    The utility model relates to a kind of accessibility means in particular to a foldable noiseless abacus. It includes beads and a frame, characterized in that each three array beads serves as a group and there are four groups. The hinge is connected between each group, and iron wire penetrates both ends of each group, and both ends of iron wire are provided with nuts. This abacus of utility model is very suitable to the elders for recreation and it is convenient to carry and use.
Time: 10
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