- Aavid Thermal Products
- Abbott Electronics
- Accumet
- Acopian
- Adaptec
- Advanced Control Components
- Advanced Linear Devices
- Advanced Power Solutions
- Advanced Power Technology
- AEP Connectors
- AeroComm
- Aeries Electronics
- Aeroflex
- Aethercomm
- Agilent Technologies (formerly part of HP)
- Allegro
- Allen Avionics
- Alpha Industries (now Skyworks Solutions)
- Alpha Wire
- Altima Communications
- American Power Design
- American Technical Ceramics (ATC)
- Amitron (now Anaren)
- AML Communications
- Amp, Inc.
- Amphenol
- Amplica (now AML Communications)
- Amplifonix (now part of Spectrum Control)
- Amplifier Research (now AR Worldwide)
- Anadigics
- Analog Devices
- Anaren Microwave
- Anritsu
- Antenna Research
- APA Wireless Technologies
- Apcom
- Applied Micro Circuits
- Applied Signal Technology
- ARC Technologies
- Aries Electronics
- Arizona Microtek
- ARRA, Inc.
- Artesyn Technologies
- AR Worldwide
- Associated Components Technology
- Astec
- Astra Microwave
- Astrodyne
- Astrolab
- ATC (American Technical Ceramics)
- ATC Power Systems
- Atmel Corporation
- AVX Corporation
- BAE Systems (was GEC-Marconi)
- Barry Industries
- Behlman
- Belden
- Bell Labs
- Berg Electronics
- Bergquist
- Beta Dyne
- Bird Electronic Corp.
- Bliley Electric Co.
- Boldt Metronics (now Laird Technologies)
- Bomar Crystal Company
- Boonton Electronics
- Bourns
- Brel International
- Broadcom
- Bud Industries
- Burr-Brown Corporation (now TI)
- Caddock
- Cal-Chip Electronics
- Calex
- California Eastern Labs (NEC)
- Cambridge Silicon Radio (CSR)
- Cambion (now Wearnes Cambion)
- Cardinal Components
- Celeritek
- Celwave (now Radio Frequency Systems)
- Centellax
- Central Semiconductor
- CET Technology
- Champion Technologies
- Channel Microwave Corporation
- Chelton Microwave
- Cherry Electrical Products
- Cherry Semiconductor (now On Semiconductor)
- Chip Supply
- Chomerics
- Coilcraft
- Coiltech
- Com Dev International
- Communication Coil, Inc.
- Compel Electronics
- Communication Solutions, Inc.
- ComNav Engineering Inc.
- Compac
- Components Corporation
- Comsat Laboratories
- Comtech PST
- Comtech Telecommunications Corp.
- Condor DC Power Supplies
- Conexant
- Connecticut Microwave
- Connor Winfield
- Cornell Dubilier
- Cougar Components
- CPI, Beverly Microwave Div. (was Varian)
- Crydom
- Crystek Crystals Corporation
- CTI
- CTS Corp.
- CTT Inc.
- Cushcraft
- Cypress Semiconductor
- Daden-Anthony Associates (now Microwave Circuits, Inc.)
- Daico
- Dantona Industries
- DATEL Inc.
- Datum
- DDC (Data Device Corp.)
- Delevan
- Delta Electronics (connectors)
- Delta Microwave
- Dielectric Laboratories
- Dorado International
- DowKey Microwave Corp.
- Dupont Microcircuit Materials
- Dynawave
- Eastern Wireless TeleComm (filters)
- Easy Magnet Corp.
- Eccosorb (Emerson & Cuming Microwave Products)
- Echotek
- Ecliptek
- ECS, Inc.
- Efratom (now Datum)
- EiC Corp.
- Elantec
- Electro Dynamics Crystal Corp.
- Elgar Electronics Corp.
- EMC Technologies
- Emerson & Cuming Microwave Products (Eccosorb)
- Emhiser Research
- EM Research
- Endwave
- EPCOS (was Siemens Matsushita (S+M))
- Epson
- Epson Electronics America
- Exar
- E-Z-Hook
- Fairchild Semiconductor
- Fair-Rite
- FEI Communications (Frequency Electronics)
- Ferronics
- Filtel Microwave
- Filtran Microcircuits
- Filtronetics, Inc
- Filtronic plc
- Filtronic Sigtek
- Florida RF Labs
- Fotofabrication Corp.
- Fox Electronics
- Fractal Antenna Systems
- Freescale Semiconductor (was Motorola Semiconductor)
- Frequency Devices
- Frontier Electronics
- FSY Microwave (now Spectrum FSY Microwave)
- Fujitsu
- Fujitsu Compound Components
- GaAsTEK (now M/A-COM)
- Gabriel Electronics
- Galileo Technology
- GEC-Marconi (now BAE Systems; see also Marconi Caswell, Ltd. and Daico)
- General Microwave
- General Semiconductor
- GHz Technology Inc. (now Advanced Power Technology)
- GigaLane
- GIL Technologies
- Glenair
- GMT Microelectronics
- Gore, Inc.
- Gowanda Electronics
- Grayhill
- Greenray Industries
- GT Microwave
- Hammond Mfg. Co.
- Harbour Industries
- Harris Semiconductor (now Intersil)
- Haverhill Cable and Manufacturing Corp.
- Herley
- Herotek
- Hewlett Packard
- Hitachi Semiconductor
- Hittite Microwave Corporation
- Huber+Suhner
- Hukk Engineering
- Hypertronics
- IC Works (now Cypress Semiconductor)
- IFR
- Illinois Capacitor
- Imp, Inc.
- Infineon Technologies (was Siemens Microelectronics)
- Inmet (now Aeroflex/Inmet)
- Instrument Specialties (EMI gasketing, shielding, etc.)
- Insulated Wire
- Integrated Circuit Systems
- Integrated Microwave
- Integrated Power Designs
- Integration Associates
- International Manufacturing Services (Resistors)
- International Power Sources (now XP Power)
- International Rectifier
- Interpoint
- Intersil (was Harris Semi.)
- Intronics
- IRC
- Isola
- ITT Industries, Cannon
- ITT Industries, Microwave Systems
- IXYS Corp.
- JCA Technology, Inc.
- JFW Industries
- Johanson Manufacturing
- Johanson Technology
- Johnson Components
- J.W. Miller
- Kalmus (now AR Worldwide)
- Kamaya (Mitsubishi resistive products)
- KDI/Triangle (now part of Aeroflex)
- Keithley Instruments
- KEMET Electronics
- Kepco
- Keystone Electronics
- Kings Electronics
- K & L Microwave
- KMW
- Knox Semiconductor
- KOA Speer Electronics
- Kota Microcircuits
- KW Microwave
- L-3 Communications
- Laird Technologies
- Lambda
- Lansdale Semiconductor, Inc.
- Lark Engineering
- Larsen Antenna Technologies (now Radiall/Larsen Antenna Technologies)
- LCF Enterprises
- Leader Tech
- Linear Integrated Systems
- Linear Technology Corporation
- LinFinity Microelectronics
- Linx Technologies
- Litton Industries
- Lorch Microwave
- Lucent Technologies
- Luff Research
- Lumex
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- M/A-COM
- Magnum Microwave (now part of Spectrum Microwave)
- Marki Microwave
- Martek Power Group
- Matsushita Electronics Components (Panasonic)
- Matsushita Electronics Corp. (Panasonic)
- Maury Microwave Corporation
- Maxim
- Maxrad
- Maxtek Components Corp.
- MCE Technologies (now Aeroflex Microelectronic Solutions)
- Meca Electronics
- Melexis
- Merrimac Industries
- Metcal
- Metelics (now Aeroflex/Metelics)
- Methode Electronics
- Metuchen Capacitors
- MF Electronics
- Mica Microwave
- Micrel Semiconductor
- Microchip Technology Inc.
- Micro-Coax
- Micro Crystal
- Microlab/FXR
- Micro Lambda Wireless (formerly Micro Lambda, Inc.)
- Micro Linear
- Micrometals
- MicroMetrics
- Micronetics Wireless
- Micro Networks Corporation
- Micropac
- Microphase
- MicroPower Direct
- Micro-Precision Technologies
- MicroSemi
- MicroSignals
- Microtune
- Microwave Circuits
- Microwave Communications Lab
- Microwave Components
- Microwave Dynamics
- Microwave Filter Company
- Microwave Solutions
- Mid-Atlantic R.F. Systems
- Midwest Microwave
- Milliren Technologies, Inc.
- Mill-Max
- Mimix Broadband
- MiniCircuits
- Mini-Systems
- Mitel Semiconductor (now Zarlink Semiconductor)
- Miteq
- Mitsubishi Semiconductor
- Modco (VCOs)
- Modular Devices
- Molex
- Motorola Semiconductor Products Sector (see also On Semi.)
- MPD Technologies
- Mpulse
- M.S. Kennedy
- M-tron Industries
- Murata Electronics North America
- MX-COM, Inc.
- M2 Global Technology
- NARDA Microwave
- National Semiconductor
- Nearson (Antenna products)
- NEC (California Eastern Labs)
- NEL Frequency Controls
- Netcom, Inc.
- Nextec
- NJR Corporation
- Noise Com
- Norcomp
- NTK, Inc.
- Oak Frequency Control (now part of Vectron International)
- Ohmcraft
- Oki Semiconductor
- Omniyig
- On Semiconductor (see also Motorola SPS)
- Optek Technology, Inc.
- Oscilent
- Oscillatek
- OXLEY Group USA
- Pacific Wireless
- Panasonic (Matsushita Electronics Corp.)
- Paratek Microwave
- Peregrine Semiconductor
- Pericom Semiconductor Corporation
- Philips Semiconductors
- Phoenix Contact
- Phonon
- Pico Electronics
- Piezo Technology, Inc.
- PMC-Sierra
- Pole/Zero
- Polyflon
- PolyPhaser
- Pomona Electronics
- Powerbox
- Powercube
- PowerDesigns (now Technipower LLC?)
- Power-One
- Power Solutions
- Powerwave Technologies
- Precision Devices
- Presidio Components
- Precision Tube
- Premier Devices (was RF Prime)
- Pulsar Microwave
- Pulse Engineering
- Pulse Research Lab
- Q-bit (now part of Spectrum Microwave)
- QMI (now Tensolite)
- Q-Tech
- Quartzlock
- QUEST Microwave
- Radiall
- Raditek
- Rakon
- Raltron Electronics
- Rangestar (now part of Tyco Electronics)
- Rantec Power Systems
- Raychem Corp.
- Raytheon Company
- RCD Components
- RDL Instrumentation
- Reactel
- REMEC
- REMEC Defense and Space (now part of Chelton Microwave)
- Renaissance Electronics Corporation
- Renco Electronics
- RFHIC
- RFI
- RF Micro Devices
- RF Monolithics
- RF Power Components (now Anaren)
- RF Power Systems
- RF Prime (now Premier Devices)
- Rohde-Schwarz
- RLC Electronics
- RO Associates
- Rogers Corp.
- Rohm
- Sage Laboratories
- Salisbury Engineering (now part of Spectrum Microwave)
- Samsung Semiconductor
- Samtec
- Sanyo Semiconductor
- Sensitron Semiconductor
- Saronix (part of Pericom Semiconductor Corporation)
- Satcon Technology
- Sawtek
- Seavey Engineering (part of Antenna Research)
- Semiconductor Circuits (power supplies)
- Semtech Corporation
- Sensor Scientific (Thermistors, etc.)
- Siemens Matsushita (S+M) (now EPCOS)
- Siemens Microelectronics (now Infineon Technologies)
- SiGe Microsystems
- Signal Technologies
- Sigtek, Inc. (now Filtronic Sigtek, Inc.)
- Silicon Laboratories
- Siliconix (now part of Vishay)
- Silicon Wave
- Sipex
- Sirenza Microdevices (was Stanford Microdevices)
- Skyworks Solutions
- Sonoma Scientific
- Sorensen (now Elgar)
- Spectrian (now Remec)
- Spectrum Control
- Spectrum FSY Microwave
- Sprague-Goodman Electronics
- SPT (Signal Processing Technologies) (now Fairchild Semiconductor)
- SRI Connector Gage
- SRI Hermetics
- SSB Technologies, Inc. (now Stealth Microwave)
- Stanford Microdevices (now Sirenza Microdevices)
- State of the Art (Resistors)
- Statek
- Stealth Microwave
- ST Microelectronics
- Supertex
- SV Microwave
- Synergy Microwave
- Synergy Semiconductor (now Micrel Semiconductor)
- SynQor
- Taiyo Yuden (global)
- Taiyo Yuden (USA)
- TDK Components
- TeCal (also known as Taiyo Tecal)
- Tech-Etch
- Technipower
- Technitrol Inc.
- Tecknit
- Tecom Antennas
- Tektronix
- Telcom Semiconductor (now Microchip Technology, Inc.)
- Teledyne Microwave
- Teledyne Technologies
- Telex Communications
- Temex
- Temic Corporate
- Temic (Telefunken) Semiconductors (now Atmel)
- Tensolite
- Texas Instruments
- Thermometrics
- Thomson Microsonics (now part of Temex)
- Thunderline-Z
- Times Microwave Systems
- Toko America
- TOKO IC
- Toshiba America Electronic Components
- Total Power
- Toyocom USA
- Trak Microwave
- Transcept (now OpenCell Corporation)
- Transilica (now part of Microtune)
- Transistor Devices, Inc.
- Trans-Tech
- Trilithic, Inc.
- TriQuint Semiconductor
- TRM
- Trompeter Electronics
- Tropian
- Tru-Connector
- TTE
- TTI
- Tusonix
- UltraRF (now Cree)
- UltraSource
- Ultra Volt
- United Monolithic Semiconductors
- Unitrode
- Universal Microwave Corporation (Oscillators)
- U S Electronics
- U S Monolithics
- ValpeyFisher
- Vanguard Electronics (inductors, etc.)
- Vanguard Products (EMI gaskets, etc.)
- Vari-L Company, Inc. (now Sirenza Microdevices)
- Vectron International
- Vicor
- Vishay
- Vitesse Semiconductor
- Vitramon (now Vishay Vitramon)
- Voltronics
- VPT
- Wakefield Engineering
- Wall Industries
- WaveCom Electronics (now VCom, Inc.)
- Weinschel Corporation (now Aeroflex/Weinschel)
- Wenzel Associates
- Werlatone
- Wilco
- Winchester Electronics
- Wireless Valley Communications
- WJ
- W.L. Gore, Inc.
- Xemod
- Xertex Technologies (now part of Centurion)
- Xetron
- Xicor (now Intersil)
- XPiQ (now XP Power)
- XP Power (was XPiQ)
- Xtal Technologies, Ltd.
- X2Y
- Zarlink Semiconductor
- Z-Communications, Inc.
- Zero Cases
- Zetex Semiconductors
- 3M
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