Inventor

WANG CHWAN-CHERNG

TW2 patents

Patents

2 patents

US5876159AMar 2, 1999

Sprocket trimming method for the multi-stage sprocket assembly

IND TECH RES INST42 citations89

US5409422AApr 25, 1995

Two sprocket tooth trimming methods and the structure thereof for the multi-stage sprocket assembly in a bicycle

IND TECH RES INST12 citations70