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Espey Mfg. & Electronics Corp., a power electronics design and original equipment manufacturing company, designs, manufactures, and tests electronic equipment primarily for use in military and industrial applications in the United States and internationally. The company's principal products include power supplies, power converters, filters, power transformers, magnetic components, power distribution equipment, UPS systems, antennas, and high-power radar systems for use in AC and DC locomotives, shipboard power, shipboard radar, airborne power, ground-based radar, and ground mobile power applications. It also provides various services comprising design and development to specification, build to print, design services, design studies, environmental testing services, metal fabrication, painting services, and development of automatic testing equipment. In addition, the company produces individual components, such as inductors, as well as paints, wires, qualifies, and test items; populates printed circuit boards; and fabricates metalwork. It serves industrial manufacturers and defense companies, the government of the United States, foreign governments, and foreign electronic equipment companies through its direct sales organization and outside sales representatives. Espey Mfg. & Electronics Corp. was incorporated in 1928 and is based in Saratoga Springs, New York.

Liquidmetal Technologies, Inc., a materials technology company, designs, develops, and sells custom products and parts from bulk amorphous alloys to various industries in the United States and internationally. The company provides bulk amorphous alloy custom products and parts for applications, which include non-consumer electronic devices, medical products, automotive components, and sports and leisure goods. It offers tooling and prototype parts, such as demonstration parts and test samples for customers with products in development; and engages in product licensing activities. In addition, the company partners with third-party manufacturers and licensees to develop and commercialize liquid metal alloy products. The company was incorporated in 1987 and is based in Lake Forest, California.

SU Group Holdings Limited, through its subsidiaries, operates as an integrated security-related services company in Hong Kong and internationally. The company operates through two segments, Security-Related Engineering Services Business; and Security Guarding and Screening Services Business. It primarily provides security-related engineering, security guarding and screening, and related vocational training services. The company also engages in the design, supply, installation, maintenance, and testing and commissioning of various security systems. In addition, it offers threat detection systems, including X-ray machines, trace detection products, metal detectors, and mail screening machines; traffic and pedestrian control systems, such as traffic control system, automatic fare control systems, turnstiles, automatic door system, and people counting systems; and extra-low voltage systems comprising closed-circuit television, access control, public address, and building management systems to commercial properties, public facilities, and residential properties. Further, the company provides screening services, such as the detection of explosives, and incendiary devices in air cargo consignment and detection of dangerous goods through threat detection systems by screeners; and training courses for basic security services, mandatory basic safety, and training revalidation courses. Additionally, it offers equipment leasing services. The company was founded in 1998 and is headquartered in Kwun Tong, Hong Kong. SU Group Holdings Limited operates as a subsidiary of Exceptional Engineering Limited.

Wrap Technologies, Inc operates as a development stage security technology company. It focuses on delivering solutions to customers, primarily law enforcement and security personnel. The firm products includes BolaWrap 100, which is a hand-held remote restraint device that discharges an eight-foot bola style Kevlar tether to entangle an individual at a range of 10-25 feet. The company was founded by Elwood G. Norris, Scot J. Cohen and James A. Barnes on March 2, 2016 and is headquartered in Las Vegas, NV.