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Bel Fuse Inc. designs, manufactures, markets, and sells products that are used in the networking, telecommunications, computing, general industrial, high-speed data transmission, military, commercial aerospace, transportation, and e-Mobility industries in the United States, the People's Republic of China, Macao, the United Kingdom, Slovakia, Germany, India, Switzerland, and internationally. It offers magnetic solutions, such as integrated connector modules, power transformers, SMD power inductors and SMPS transformers, and ethernet discrete components. The company also provides power solutions and protection products comprising front-end power supplies, board-mount power, industrial and transportation power, external power, module, and circuit protection products. In addition, it offers connectivity solutions, which includes expanded beam fiber optic connectors, cable assemblies, and active optical devices; copper-based connectors/cable assemblies; radio frequency connectors, cable assemblies, microwave devices, and low loss cables; and ethernet, I/O, and industrial and power connectivity. The company sells its products under the Bel, TRP Connector, MagJack, Signal, Bel Power Solutions & Protection, Melcher, CUI, EOS, Stratos, Fibreco, Cinch, Johnson, Trompeter, Midwest Microwave, Semflex, and Stewart Connector brands through direct strategic account managers, regional sales managers working with independent sales representative organizations, and authorized distributors. Bel Fuse Inc. was incorporated in 1949 and is headquartered in West Orange, New Jersey.

Dais Corporation operates as a proprietary and nanotechnology polymer materials company. The company offers Aqualyte, a nanomaterial platform made from commercially available polymer resin and industrial grade solvents, which are mixed using a proprietary process with traditional industrial equipment; and ConsERV, a fixed plate energy recovery ventilator that is useful in meeting building indoor fresh air requirements while saving energy and lowering emissions for various forms of heating, ventilation, and air conditioning equipment. It also provides NanoClear, a water clean-up process useful in the creation of potable water from contaminated water, including salt, brackish and wastewater; NanoAir; and NanoCap, an energy storage application. The company also licenses its products. The company was formerly known as Dais Analytic Corporation Inc. and changed its name to Dais Corporation in February 2019. Dais Corporation was incorporated in 1993 and is headquartered in Odessa, Florida.

Focus Universal Inc. develops and manufactures smart instrumentation platform and device. It offers Ubiquitor, a wireless sensor device with a universal sensor node and gateway system that uses a computer or mobile device as the output display module that displays the readings of various sensor nodes. The company's universal smart instrumentation platform (USIP) utilizes mobile devices or computers to communicate with smart devices, such as sensors, instruments, probes, and controllers to monitor and control any functions. It also offers digital sensors and horticultural sensors, as well as universal smart controller (USC), a controller device. Further, the company provides filter and handheld meter products, including fan speed adjuster, carbon filter, and HEPA filtration systems, as well as digital light and quantum par meters through distributors. Additionally, it provides integration of houses, apartment, commercial complex, and office spaces with audio, visual, and control systems to integrate devices in the low voltage field, as well as partial equipment upgrade and installation services. The company was incorporated in 2012 and is based in Ontario, California.