Inventor
JIAN ZHANG-YONG
CN3 patents
Patents
3 patentsUS7395604B2Jul 8, 2008
Laser level with temperature control device and temperature control method thereof
ASIA OPTICAL CO INC13 citations80
US7228635B2Jun 12, 2007
Laser tilt apparatus and the method thereof
ASIA OPTICAL CO INC13 citations80
US7117111B2Oct 3, 2006
Adjusting method of a tilt meter
ASIA OPTICAL CO INC2 citations56