Title: Electronic abacus and its operation method
Application Number: 200410040825 Application Date: 2004.10.08
Publication Number: 1601508 Publication Date: 2005.03.30
Approval Pub. Date: 2007.05.02 Granted Pub. Date: 2007.05.02
International Classifi-cation: G06F15/02;G06C1/00;H01H13/14
Applicant(s) Name: Yu Liping Address:
Inventor(s) Name: Yu Liping
Attorney & Agent: li an
Abstract:
    An electronic abacus includes arithmetic unit, input unit, and display unit. The said input unit is connected to display unit and arithmetic unit. The arithmetic unit receives input information from the input unit and carries out process for the input information, and relevant information is displayed on the display unit. The input unit includes functional key buttons and digit key buttons including multiple groups of digit keys. One group of digit keys includes
Time: 6
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