Title: Abacus with bistable metachromatic keys
Application Number: 97111060 Application Date: 1997.05.29
Publication Number: 1171572 Publication Date: 1998.01.28
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G06C1/00
Applicant(s) Name: Fu Xiaoyou Address: 030009
Inventor(s) Name:
Attorney & Agent: GUO KEYU
Abstract:
     An improvement on traditional abacus features use of toggle-type colour buttons to replace traditional beads of abacus for easy read and more reliable calculation because of its bistable structure. It also used two reset buttons for clearing the value. Its advantages include compact structure, low cost and convenient use.
Time: 10
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