Semsa Elektronik Ltd.
Manufacturer of air core coils, transformers and inductors built on toroidal, EI laminated, and ferrite cores as well as current transformers.
http://www.semsa.com.tr

E Core Corp.
manufacturer of E CORE EMI, cores, MN - ZN core, NI - ZN core, ferrite core, BF(R), BF(Z), BF( U ), T CORE, CP, RHW, RWW, SMD - DR CORES, SMD - DR( SV ), SMD - DR , RI, STP CORE, printed circuits bead, surface mount bead, drum core, rod core, tapping bead, connector suppressors, antenna bar, balun core, wound bead, shield bead, round cable EMI cores, flat cable EMI cores, EE ER eel EI cores, EP EER cores, EFD EPC cores, RM cores, EE EU UI cores, UU URS cores, pot cut cores, chip bead, chip array, solder ball.
http://www.ecorecorp.com/

Leader Electronics Inc.
Manufacturer of switching and linear power supplies, adapters, transformers, SPS, USPS, chokes, coils, ferrite core, battery charger and travel charger. From Taiwan.
http://www.lei.com.tw/

King Core Electronics Inc.
Manufacturer of through hole ferrite suppression cores and ferrite chip beads and inductors.
http://www.kingcore.com

Encore Electronics Technology Co., Ltd.
Manufacturer of electronic components, such as ferrite core, power inductor, transformer, converter, inverter, line filter, network product, EMI, EMC, LAN, TOROID, Mn-Zn.
http://www.encores.com.tw/

Top-View Coil Products Co Ltd
Manufacturer of coils and inductors. The product range includes surface-mount transformers, choke coils, inductor coils, toroidal coils and watch choke coils.
http://www.topview.com.hk

Skandinavian Transformer Sp. z o.o.
Skandinavian Transformer
http://www.skandinaviantransformer.com.pl/en/index.html

Chia Pi Electrical Co.,Ltd.
Manufacturer of Mn-Zn, Ni-Zn, EMI, SMD ferrite core& toroid, pot, EE, ET, UU, EI cores.
http://www.chiapi.com.tw

A&B Electronics
Throughout the past 21 years, our coil building capabilities have included: Solenoid Coils, Magnetic Relay Coils, Heating Elements, Special Filters, Torroids-large & small, Wire Wound Resistors, RF & IF Coils, Potcore Transformers, Sub Assembly Work Ground Straps, Hooks & Probes and Custom Networks.
http://www.abelectronics.net/

Core-Tech Corporation
Manufacturer and exporter of electronic components, such as ferrite cores, EMI cores, bar cores, sleeve cores, ferrite tile, SMD cores, SMB cores, bobbin cores, toroidal cores, balun cores, rod cores, drum cores, IFT cores, choke cores, snap on cores, clamp cores.
http://www.coretechweb.com.tw/