In Japan:

AET Inc.
2-7-6 Kurigi, Asaoku, Kawasaki-city,
Kanagawa, Japan
Phone: 81-44-980-2525
Fax: 81-44-980-1515
http://www.aetjapan.com

In China:

Shanghai CWOPTO Technology Co., LTD.
Room 1507, Building I,
No.106 Zhongjiang Road, Putuo District,
Shanghai, P. R. China 200062
Phone: +86 155 0217 0017
Fax: +86 21 5047 7207
http://www.cwopto.com/en

In South Korea:

LUEN Soft Inc.
DS Tower Bldg., 4th Fl., 312 Jungdae-ro, Songpa-gu
Seoul, Korea 138-858
Phone: 82-2-6485-6701
Fax: 82-2-6485-6711
http://www.luensoft.co.kr