• 

  Mitsubishi Electric

• 

  Mitsubishi

• 

  Kyoritsu

• 

  Mitsuboshi

• 

  Anritsu

• 

  Shin Etsu

• 

  Tsukasa Electric Works Co., Ltd.

• 

  Fuji Seimitsu

• 

  Hamamatsu

• 

  Matsushita (Panasonic)