Trinetics Group Inc. (USA)
- Buy and sell used reconditioned branson ultrasonic welders and parts.
- http://www.bransonultrasonicwelders.com/

Telsonic AG
- Manufactures and designs equipment for ultrasonic welding, cleaning, sieving, sonochemistry and specialised ultrasonic applications. Switzerland.
- http://www.telsonic.com/

Strong Ultrasonic Machinery CO., LTD
- ultrasonic welding
- http://www.st-rong.com/

Sonobond Ultrasonics
- Manufacture ultrasonic welding and joining equipment for plastics, metals and fabrics. Includes general technical data on ultrasonic welding .
- http://www.sonobondultrasonic.com/

Sonics & Materials Inc.
- Manufacturer ultrasonic, vibration, spin, hot plate, and heat staking equipment for the welding and joining of thermoplastic components and textiles. The company also manufacture ultrasonic liquid processors .
- http://www.sonicsandmaterials.com/

Sonic & Thermal Technologies, Inc
- Manufacturer of ultrasonic welders for plastic welding and heatstaking machinery for insertion, staking, degating and date-coding plastic parts. Ultrasonic horns and free technical bulletins.
- http://www.sonitek.com/

Lou Zampini& Associates
- Manufacturers agents and industrial distributors of ultrasonic, spin, vibration, hot plate and thermal staking and welding machines for the assembly of thermoplastic parts.
- http://www.plasticwelders.com/

Herrmann Ultraschalltechnik GmbH & Co. KG
- Developer and manufacturer of ultrasonic welding equipment for the bonding, laminating and cutting of thermoplastic materials. Includes general section on the principles of ultrasonics. Germany .
- http://www.herrmannultraschall.com/

Forward Technology Industries Inc.
- Provides ultrasonic and spin welding equipment. Products include hot plate, ultrasonic, spin and vibration welders thermostakers and leak testers .
- http://www.forwardtech.com/

Branson Ultrasonics Corporation
- Design and manufacture ultrasonic welding equipment for joining, sealing, staking, and degating thermoplastics, as well as linear and orbital vibration welders, hot plate welders, and spin welders.
- http://www.bransoncleaning.com/

AmTech (USA)
- Manufacture ultrasonic metal welding equipment. Includes good technical information including the theory of ultrasonic welding.
- http://www.amtechultrasonic.com/