| 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 | ||
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Abstract: |
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| 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 | |||
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| Time: | 6 | ||
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