Title: Bamboo frame abacus
Application Number: 97111068 Application Date: 1997.06.04
Publication Number: 1170897 Publication Date: 1998.01.21
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G06C1/00
Applicant(s) Name: Jin Jianguo Address: 325100
Inventor(s) Name: jin Jianguo
Attorney & Agent:
Abstract:
     The present invention relates to the improved frame material and structure of abacus. The frame is made of bamboo material adhered together, the four corners have embedded inner bolts and are rounded, bars are fitted closely to horizontal frames and bondary strip, and the bottom of abacus is a thin sheet. The bamboo frame abacus is light, strong, non-deforming, beautiful and smart in dialing beads.
Time: 12
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