United Chemi-Con, Inc. United Monolithic Semiconductors Unisonic Technologies Co., Ltd. U.S. Toyo Fan Corporation USRobotics u-blox America, Inc. Uniroyal Electronics Industry Co., Ltd. Ultralife Corporation US Seismic Systems, Inc. U.S. Sensor UTC Fire & Security UHI Worldwide Ubicom, Inc. UNIOHM CORP UNIVERSAL TECHNOLOGIES GROUP United Automation, Inc. Unicom US Digital u2t Photonics AG u-blox AG Uctech Limited Union Technology Corporation US Relays and Technology, Inc. Universal Microelectronics Co., Ltd. Utron Technologies Corp. Unity Opto Technology Co., Ltd. Union Semiconductor, Inc. uPI Semiconductor Corp. Unigen Corporation