Jackson IPG PLLC
Apparatus erasing blackboard through areas
The present invention wipes a writing board through areas. A teacher can wipe an area of a blackboard while writing on another area. Thus, a writing board can be flexibly used with convenience obtained and time saved.
National Central University
B B
B43L B43L
inventional inventional
Po-Ting Shu-San Peng-Shin Chi-Hsin Chao-Hung Yi-Fu
Pan Hsiau Lee Ho Zeng Hsieh