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Bonso Electronics International Inc., together with its subsidiaries, designs, develops, produces, and sells electronic sensor-based and wireless products. It operates in four segments: Scales, Pet Electronic Products, Rental and Management, and Others. The Scales segment provides sensor-based scales products that include bathroom, kitchen, office, jewelry, laboratory, postal, and industrial scales for consumer, commercial, and industrial applications. The Pet Electronic Products segment develops and produces pet-related electronic products for use in consumer applications. The Rental and Management segment offers leasing of factories and machineries to third parties. The Others segment sells cordless leaf blowers, food vacuum sealers, and hydroponics growing systems, as well as scrap materials; and provides tooling and molding charges for scales. It serves private label original equipment, original brand manufacturers, and original design manufacturers primarily in the United States, Germany, and the People's Republic of China. The company also sells its pet electronic products through online platforms. The company was formerly known as Golden Virtue Limited and changed its name to Bonso Electronics International Inc. in September 1988. Bonso Electronics International Inc. was incorporated in 1988 and is based in Tsim Sha Tsui, Hong Kong.

Inrad Optics, Inc., together with its subsidiaries, develops, manufactures, and markets glass, crystal, and metal based optical components, and sub-assemblies. It offers UV-IR optics and assemblies, such as precision custom optics and thin film optical coatings; glass and single crystal substrates; and deposit optical thin films, and assemble sub-components used in advanced photonic systems. The company also offers large form factor transmission flats, optical windows for airborne applications, multi-element optical assemblies, lenses, mirrors, polarizing optics, prisms, and wave plates; interferometer and transmission flats; and multi-element optical assemblies In addition, it provides X-Ray imaging optics, including bent x-ray monochromators from crystal materials and orientations; and metal substrate optics and assemblies, such as precision aspheres, large and small metal mirrors, low RMS surface finish polished mirrors, reflective Porro prisms, and thermally stable optical mirrors; and void-free gold and electroless nickel plating specialties. Inrad Optics, Inc. also exports its products Europe, Israel, Asia, and Japan. The company was formerly known as Photonic Products Group, Inc. and changed its name to Inrad Optics, Inc. in 2012. Inrad Optics, Inc. was incorporated in 1973 and is based in Northvale, New Jersey.

Microwave Filter Company, Inc. designs, develops, manufactures, and sells electronic filters for radio and microwave frequencies primarily in the United States. It manufactures RF filters and related components for eliminating interference and facilitating signal processing for cable television, broadcast, commercial and military communications, avionics, radar, navigation, and defense markets. The company also designs waveguide, stripline/microstrip, transmission line, miniature/subminiature, and lumped constant filters. Its configurations include bandpass, highpass, lowpass, bandstop, multiplexers, tunable notch, tunable bandpass, high power filters, amplitude equalized, delay equalized, and filter networks. The company serves 5G, cable television, television and radio broadcast, satellite broadcast, mobile radio, commercial, and aerospace and defense electronics markets. Microwave Filter Company, Inc. was incorporated in 1967 and is based in East Syracuse, New York.

Nortech Systems Incorporated provides design and manufacturing solutions for electromedical devices, electromechanical systems, assemblies, and components in the United States, Mexico, and China. It offers a range of technical and manufacturing, and support services, including project management, designing, testing, prototyping, manufacturing, supply chain management, and post-market services. The company also provides manufacturing and engineering services for medical devices, printed circuit board assemblies, wire and cable assemblies, and higher-level electromechanical assemblies. In addition, it offers engineering and repair services. The company serves original equipment manufacturers in the medical, aerospace and defense, and industrial markets through business development teams and independent manufacturers' representatives. Nortech Systems Incorporated was founded in 1990 and is headquartered in Maple Grove, Minnesota.

Orbit International Corp. engages in the design, manufacture, and sale of electronic components and subsystems, and commercial and custom power units for prime contractors, government procurement agencies, and research and development laboratories worldwide. The company operates in two segments, Electronics Group and Power Group. The Electronics Group segment designs, manufactures, and sells customized electronic components and subsystems. This segment offers remote control units, intercommunication panels, displays, keyboards, keypads and pointing devices, operator control trays, and command display units, as well as provides LCD display modules design and enhancement services. The Power Group segment designs and manufactures commercial power units, AC power, frequency converters, uninterruptible power supplies, armament systems, and commercial-off-the-shelf power solutions, as well as inverters. The company was formerly known as Orbit Instrument Corp. and changed its name to Orbit International Corp. in July 1991. Orbit International Corp. was founded in 1957 and is based in Hauppauge, New York.