• 

  Halfen

• 

  Fenner

• 

  Fenwal [Honeywell]

• 

  Pnevmatika-Fenix

• 

  Dieffenbacher

• 

  Efen

• 

  Fenwal, Inc

• 

  Kidde Fenwal

• 

  Tiefenbach

• 

  Guangdong Fengming Electronic Tech. Co., Ltd.