Terahertz Technologies Inc., USA

(www.teratec.us)

Handlink Technologies Inc., Taiwan

( http://www.handlink.com.tw/ )

Terasense Group Inc. , USA

(www.terasense.com)

SVPRIBOR, Russia

(http://svpribor.ru/eng.php)

Aitelong, China

(http://www.aitelong.com)