Title: Modern abacus
Application Number: 200410061410 Application Date: 2004.12.22
Publication Number: 1797384 Publication Date: 2006.07.05
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G06F15/02,G06C1/00
Applicant(s) Name: Ye Bofei Address: 430030
Inventor(s) Name:
Attorney & Agent:
Abstract:
     The invention discloses a modern abacus, using the free known technique to reconstruct and improve the Chinese traditional abacus to make it able to be operated without remembering a pithy formula, especially largely raising operational speed of multiplication and division, avoiding the trouble that a user must spend a longer time in learning before mastering the reckoning technique.
Time: 6