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Cemtrex, Inc. operates as a technology company in the United States and internationally. It operates through Security, Industrial Services, and Cemtrex Corporate segments. The company offers browser-based video monitoring and analytics-based recognition systems, cameras, servers, and access control systems for security and surveillance in industrial and commercial facilities, federal prisons, hospitals, universities, schools, and federal and state government offices; and provides critical security and video surveillance solutions utilizing artificial intelligence based data algorithms. It also provides services for rigging, millwrighting, in plant maintenance, equipment erection, relocation, and disassembly; installs high precision equipment in various industrial markets comprising automotive, printing and graphics, industrial automation, packaging, chemicals and others; and provides maintenance and contracting solutions for the machinery, packaging, printing, chemical, and other manufacturing markets. The company was formerly known as Diversified American Holding, Inc. and changed its name to Cemtrex, Inc. in December 2004. Cemtrex, Inc. was incorporated in 1998 and is headquartered in Brooklyn, New York.

SemiLEDs Corporation develops, manufactures, and sells light emitting diode (LED) chips, LED components, and LED modules and systems in the United States, Taiwan, the Netherlands, Germany, Japan, and internationally. The company also sells enhanced vertical, LED product series in blue, white, green, and UV; LED chips to packagers or distributors; and lighting products primarily to original design manufacturers of lighting products and the end-users of lighting devices, as well as packs and sells its LED chips. Its products are used for general lighting applications, including commercial, industrial, and residential lighting; and specialty industrial applications, such as ultraviolet or UV, curing of polymers, LED light therapy in medical/cosmetic applications, counterfeit detection, germicidal and viricidal devices LED lighting for horticulture applications, architectural lighting, and entertainment lighting. The company was incorporated in 2005 and is based in Chu-Nan, Taiwan.

Rubicon Technology, Inc. provides monocrystalline sapphire for applications in optical and industrial systems in North America, Asia, and internationally. The company offers optical and industrial sapphire products in various shapes and sizes, including sheets, rods, tubes, core, ingots, and prisms for a range of end markets comprising defense and aerospace, specialty lighting, instrumentation, sensors and detectors, semiconductor process equipment, electronic substrates, medical, and laser applications. It serves defense subcontractors, industrial manufacturers, fabricators, and resellers. The company was incorporated in 2001 and is based in Bensenville, Illinois.

WiSA Technologies, Inc. develops, manufactures, and sells audio wireless technology for smart devices and next-generation home entertainment systems in the United States and Europe. The company offers wireless modules. It serves primarily to consumer electronics companies. The company was formerly known as Summit Wireless Technologies, Inc. and changed its name to WiSA Technologies Inc. in March 2022. WiSA Technologies, Inc. was incorporated in 2010 and is headquartered in Beaverton, Oregon.