Helander Products, Inc.
Designs and manufactures miniature spring and roller clutches including overrunning clutches, single/fractional revolution clutches, on-off solenoid and magnetic actuated clutches, back stopping clutches, indexing clutches and free wheeling clutches.
http://www.tinyclutch.com/

Magnetic Technologies, Ltd. - Magnetic Brakes, Clutches and Couplings
Magnetic Technologies, Ltd. - Designer and manufacturer of high quality permanent magnet synchronous shaft couplings, permanent magnet hysteresis brakes and eddy current clutches for various industries including capping, wire & cable, fiber-optic, aerospace, converting, power transmission, chemical pump, vacuum, oil well and medical - this is our only business.
http://www.magnetictech.com/

Ogura Industrial Corp
Producer of eletromagnetic clutches and brakes in single plate, multi-disk, tooth, magnetic particle, hysteresis, c-face and foot mount
http://www.ogura-clutch.com

Placid Industries
Mfr. of Magnetic Particle Brakes, Magnetic Particle Clutches, Hysteresis Brakes and controls.
http://www.placidindustries.com

Population Dynamics with Hysteresis Effect
Papers on population dynamics with hysteresis based on phase transition phenomena, by Emil Minchev (PDF/PS).
http://www.geocities.com/minchevemil/pdhe.html

Kendrion Power Transmission
Kendrion Electromagnetic develops and produces electromagnetic components. The three business units are Automotive Systems, Magnetic Systems und Power Transmission. Automotive Systems stands for customer-specific project developments for applications in the automobile industry and hydraulics. Magnetic Systems produces standard and individual solutions for industrial applications. Power Transmission produces electromagnetic brakes and clutches for the industrial drive technology. Kendrion Electromagnetic unifies the traditional brands Binder, Thoma Magnettechnik and Neue Hahn Magnet.
http://www.kendrionat.com/

Golden Engineering Co.
Manufacture electromagnetic clutches, brakes, clutch plates, one way clutches and friction products for machine tools and packaging machines.
http://www.bensonsindia.com/home/golden/golden.html

Inertia Dynamics
Manufacturer of motion control products, including electromagnetic clutches and brakes, spring applied brakes, wrap spring clutches and brakes, motor brakes, clutch and brake controls and moment of inertia measurement instruments. Custom designs and sub-assemblies. ISO 9001 certified.
http://www.idicb.com

Hysteresis and Multi-scale Asymptotics
University College, Cork, Ireland; 17--21 March 2004.
http://euclid.ucc.ie/hamsa2004.htm

Magtrol
Manufacturer of motor testing dynamometers, hysteresis brakes and clutches for tension and torque control, torque transducers, load-force-weight measurement systems, displacement transducers, rotary transmitters
http://www.magtrol.com/