Title: Faceplate of electronic calculator convenient for plus minus method
Application Number: 200410061409 Application Date: 2004.12.22
Publication Number: 1797383 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 calculator panel convenient to addition and subtraction, using the free known technique to reconstruct and improve the panel of an electronic calculator to make its number setting rate not lower than the reckoning rate of the Chinese abacus as performing the addition and subtraction.
Time: 12