Belgium:

Laborelec 

France:

TES Electronic Solutions
Thales

Germany:

AFT, Backnang
Agilent GmbH, Boeblingen
Baur Ingenieurbuero, Moenchengladbach
Benning GmbH, Bocholt
BKtel Gmbh, Stuttgart
CONTI-TEMIC AG, Nuernberg
Dialog Semiconductor, Kirchheim/Teck
Dr. Rose, Bergisch-Gladbach
Emhart Automotive Tucker GmbH, Giessen
EWE AG, Oldenburg
Fraunhofer Institut IZFP, Stuttgart
HE Hybrid-Electronic, Veitsbronn
Heraeus GmbH, Hanau
Innosent GmbH, Geldersheim
Lewicki Microelectronic GmbH
Lust Hybrid-Technik GmbH, Hermsdorf
Micro-Hybrid Electronic GmbH, Hermsdorf
Micro Systems Engineering GmbH, Berg
Plath GmbH, Hamburg
Premier Devices, Nürnberg
Radeberger Hybrid Elektronik GmbH, Radeberg
RMR, Köln
Robert Bosch GmbH, Stuttgart, Reutlingen
Siegert GmbH, Cadolzburg
Technical Universities (several)
VIA Electronics GmbH, Hermsdorf
Volkswagen AG, Kassel
Werner Turck GmbH, Halver

Hungary:

TYCO Electronics Ltd.  

Israel:

Taditel Automotive Electronics Ltd

Netherlands:

Hymec B.V.
 

Norway:

Forsvarets Forsknings Institutt, Kjeller.
 

Slovenia

Hipot Hyb, d.o.o., Sentjernej
Jozef Stefan Insitute, Ljubljana

Spain:

BERU S.A.

Switzerland:

Huber & Suhner AG
Jaquet AG
Metallux AG
Metrohm AG
Microdul AG
reinhardt MICROTECH AG 

Turkey:

Takosan A.S.

United Kingdom:

Alenia Marconi Systems Ltd., Portsmouth
Astrium Ltd. (Matra Marconi Space), Stevenage
BAE Systems Avionics Ltd (Marconi Avionics), Stanmore
GKN Westland Aerospace Ltd., Somerset
Global Communication Ltd., Althorne
Grundig Microwave Ltd.
InvaCom Ltd, Stevenage
Philips Ltd.
Technograph microcircuits Ltd., Portsmouth

USA:

Agilent Technologies Co.
Hewlett-Packard Co.
Intel Co.
Keithley Instruments Inc.

And more ...