Inventor
QI YONG-CE
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
US7373724B2May 20, 2008
Laser level with improved leveling adjustability
ASIA OPTICAL CO INC5 citations60