- 4Tech World Co., Ltd.
- Abracon Corp.
- Advanced Crystal Technology [ACT]
- AEL Crystals Limited [Abracon]
- Aker Technology Co., Ltd.
- Amplitronix LLC
- Anderson Electronics
- Andhra Electronics Limited
- ASC Semiconductors
• now Astor Limited
- Astor Limited
- KYOCERA AVX Components Corporation
• check Kyocera Electronic • or Kyocera [Germany]
- AXTAL Products crystal oscillators, crystal filters, and frequency & time modules
- Baknor
- Beijng Hope Metal Material Co., Ltd.
- Beijing Vanlong Technical Co., Ltd.
- Bharat Electronics Limited [BEL]
- Bliley Electric Co.
- Bomar
- Bontic Electronic Company
- C-MAC MicroTechnology
• Frequency Control Products business (FCP) acquired by Rakon Limited • Rakon Ltd. sold former IQD business line to IQD Frequency Products Ltd.
- Cal Crystal Lab, Inc.
- Caliber Electronics
- Cardinal
- Champion Technologies, Inc. now MtronPTI
- CEPE
• acquired by C-MAC MicroTechnology • Frequency Control Products business (FCP) acquired by Rakon Limited • Rakon Ltd. sold former IQD business line to IQD Frequency Products Ltd.
- Ceratronics Ltd. [Zhejiang Jiakang Electronics Co., Ltd. ]
- CFP
• acquired by C-MAC MicroTechnology • Frequency Control Products business (FCP) acquired by Rakon Limited • Rakon Ltd. sold former IQD business line to IQD Frequency Products Ltd.
- Chequers Electronic Co. Ltd [Suzhou]
- Chequers Electronic (China) Limited
- CHUNGHO ELCOM
• acquired by One Light Electronics
- Cinetech
- Citizen Watch Co. [Japan]
• check Citizen America Corporation • or Citizen Europe too!
- Commutek Electronics Ltd.
- CompoTRON
- Connor-Winfield Corporation
- Corning Frequency Control, Inc.
• acquired by Vectron International
- Crescent Frequency Products Inc. microprocessor crystals, clock oscillators, TCXOs, VCXOs, and OCXOs
- Croven [Quantic Croven] SC, IT & AT-cut crystals, quartz resonators
- Crystal Works
- Crystek Corporation
- CTSCorporation
• check CTS Ceratech Corporation too!
- CTS Knights, Inc.
- DAISHINKU CORP. [KDS]
- Dielectric Laboratories [DLI]
• Dielectric Laboratories is owned by Knowles Corporation
- DLI [Dielectric Laboratories]
• Dielectric Laboratories is owned by Knowles Corporation
- eCERA ComTek Corporation
- Ecliptek Corporation
- ECM Electronics Limited
- ECS Inc. International
- EDC [Electro Dynamics Crystal Corporation]
- Electro Dynamics Crystal Corporation [EDC]
- Enicom [Tiantong Ruihong Technology Co., Ltd.]SAW filters
- EoSemi Ltd. all-silicon replacements for quartz crystals
- Epson Toyocom
- Fargo
- FOQ Piezo Technik GmbH
- Fordahl
- Fox Electronics
• acquired by IDT [Integrated Device Technology, Inc.]
• IDT [Integrated Device Technology, Inc.] acquired by Renesas Technology Corp.
- Frequency Management
- Fronter Electronics Co., Ltd.
- Geyer Electronic
- Golledge
- Great Marking (HK) Industry Co.
- Greenray Industries
- Hankyung Telecom
- Harmony Electronics Corporation quartz crystals, MEMS microphones
- HCD
- Hertz Technology Inc.
- Hong Kong X'tal [HKC]
- Hooray Electronics Company
- Hosonic Electronic Co., Ltd.
- Huang Cheng
- Huilong Electronic (Jinhua ) Co., Ltd.
- Hy-Q International
• check Hy-Q International (UK) Ltd. too!
- ILSI America, Inc.
- Infinex [owned by Flex Ltd.]
- IQD Frequency Products Ltd. quartz crystal & oscillators
• acquired by Adolf Würth GmbH & Co. KG
• please check Würth Elektronik too!
- ISOTEMP RESEARCH, Inc.
- ITTI crystals, crystal
oscillators, crystal filters, ceramic resonators
- Jauch Quartz GmbH
• check Jauch Quartz America too!
- Jiakang Ceratronics Ltd.
- K.D.K [KYUSHU DENTSU Co., Ltd. ]
- KONY Precision Co., Ltd.
• now CHUNGHO ELCOM • acquired by One Light Electronics
- KDS [DAISHINKU CORP.]
- Knowles Corporation
- KVG Quartz Crystal Technology GmbH
- Kyocera Electronic
• check Kyocera [Germany] • or KYOCERA AVX Components Corporation too!
- KYOCERA KINSEKI Corporation
- KYUSHU DENTSU Co., Ltd. [KDK]
- Lap-Tech Inc.
- Liberal Industrial Limited
- Lorch Microwave
• acquired by Smiths Interconnect
- M-tron Industries now MtronPTI
- Macrobizes Co., Ltd.
- Manudax crystals and crystal oscillators
- MDX
- Meiden
• acquired by SIWARD CRYSTAL TECHNOLOGY Co., Ltd.
- Mercury [MEC]
- MF Electronics Corp.
- Micro Crystal [MC], an ETA company
- Micro Networks
- MMD Components
- Monitor Products Company Inc.
• acquired by MMD Components
- MTI-Milliren Technologies, Inc.
- MtronPTI
- Nanjing Electronic Devices Institute [NEDI]
- NDK [NIHON DEMPA KOGYO Co., Ltd. ]
- NEDI [Nanjing Electronic Devices Institute]
- NEL Frequency Controls, Inc.
- NIHON DEMPA KOGYO Co., Ltd. [NDK]
- Oak Frequency Control
• now: Corning Frequency Control, Inc.
- OFC
• now: Corning Frequency Control, Inc.
- OLE [One Light Electronics] crystal units, crystal oscillators, crystal filter
- Omig S.A.
- One Light Electronics [OLE] crystal units, crystal oscillators, crystal filter
- OnSpec Oscillators
- Oscilent Corporation
- Oscillatek
• acquired by Vectron Technologies
- Panasonic Japan
• Chip Tantalum Capacitor Unit acquired by Nichicon
- Panasonic Semiconductor Solutions Co., Ltd. [PSCS]
• Diode and Transistor Business Line acquired by Rohm Semiconductor Inc.
• SOC Business Line acquired by Socionext Inc.
• Panasonic Semiconductor Solutions Co., Ltd. acquired by Nuvoton Technology Corporation
- PDI [Precision Device Inc.]
- PhaseLink
- Piezo Technology, Inc. [PTI] now MtronPTI
- Pletronics, Inc.
- Precision Device, Inc. [PDI]
- Q-Tech
- QCT
- Quantic Croven [Croven] SC, IT & AT-cut crystals, quartz resonators
- Quantic Wenzel [Wenzel] crystal oscillators
- Quartz Crystal
- QuartzMaker
- Quartztek
• acquired by MMD Components
- Rakon Limited
• former IQD business line acquired by IQD Frequency Products Ltd.
- RAKON TEMEX microwave components
• acquired by Rakon Limited
- Raltron Electronics Corporation quartz filters, crystals, ceramic resonators, oscillators, clocks, VCXOs, TCXOs, OCXOs & SAWs
• acquired by RAMI Technology Group
- RAMI Technology Group quartz filters, crystals, ceramic resonators, oscillators, clocks, VCXOs, TCXOs, OCXOs & SAWs
- RF Monolithics Inc. [RFM]
• acquired by Murata Electronics
- RFX Ltd. high frequency OCXO, TCXO, VCXO and PLL modules
- River Eletec Corp.
- ROFS MICROSYSTEM (TIANJIN) Co., LTD. MEMS Sensors, Resonators, Oscillators
- RXD Technologies, L.L.C.
- Samsung Electro-Mechanics
- Sappland Microelectronics Technology Company Limited RF modules, SAW filters
- SaRonix LLC
• acquired by Pericom Semiconductor Corp.
- Sawtek Incorporated
• acquired by TriQuint Semiconductor
• TriQuint Semiconductor Inc. merged with RF Micro Devices to form Qorvo Inc.
- Seiko Epson Electronics clock oscillators
- Sentry
- Shenzhen Five-Ten Technology Co., Ltd. quartz crystals, quartz crystal filters, ceramic resonators, saw filters
- Shoulder Electronics Limited SAW filters, resonators
- SIWARD CRYSTAL TECHNOLOGY Co., Ltd.
- SJK [Shenzhen Crystal Technology]
- Spectron Technologies Co., Ltd. SAW filters & switches, RF modules
- SPK Electronics Co., Ltd.
- Statek Corporation
- Stathera, Inc. MEMS oscillators & resonators
- Sunny-Electronics Corp.
- Suzhou Chequers Electronic Co. Ltd
- TAI-SAW Technology Co., Ltd. [TST] SAW, Quartz Crystals, Oscillators and Resonators
- Taitien Electronics Co., Ltd.
- Technical Crystal Limited
- Tech-Time
- Tele Quarz Group now Corning Frequency Control
• acquired by Vectron International
- Tellurian Technologies, Inc.
- TEMEX Components microwave components • now RAKON TEMEX
• acquired by Rakon Limited
- TEW
- Tiantong Ruihong Technology Co., Ltd. [Enicom]SAW filters
- Token China Precision Power Components Inc.
- Token Electronics Ind. Co., Ltd.
- TOYOCOM
• now Epson Toyocom
- Trans-Tech Inc.
- TST [TAI-SAW Technology Co., Ltd.] SAW, Quartz Crystals,
Oscillators and Resonators
- TXC Corporation
- US Crystal Corp.
• acquired by Electro Dynamics Crystal Corporation [EDC]
- ValpeyFisher
- Vanlong Technology Co., Ltd. [VTC]
- Vectron International, Inc. crystal oscillators, monolithic crystal filters
• acquired by Dielectric Laboratories [DLI]
• Dielectric Laboratories now part of Knowles Corporation
- Vishay Intertechnology Inc.
- VITE Technology Express.
- Wenzel [Quantic Wenzel] crystal oscillators
- Wonik Corporation quartz products
- World Technologies, LTD. [WTL]
- WTL [World Technologies, LTD.]
- Würth Elektronik connectors, inductors, quartz crystal & oscillators
- Xtal Technologies Ltd.
- Z-Communications, Inc.
- Zhejiang Jiakang Electronics Co., Ltd. [Ceratronics Ltd.]
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