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ESS Tech Inc is a long-duration energy storage company specializing in iron flow battery technology. The company design and produce long-duration batteries predominantly using earth-abundant materials.
Optex Systems Holdings Inc manufactures optical sighting systems and assemblies for the U.S. Department of Defense, foreign military applications, and commercial markets. Its products are installed on a variety of United States military land vehicles, such as the Abrams and Bradley fighting vehicles, and light armored and security vehicles, and have been selected for installation on the Stryker family of vehicles. The company's operating segment includes Optex Richardson and Applied Optics Center Dallas. It generates maximum revenue from the Applied Optics Center Dallas segment. Some of its products include M17 Day/Thermal Periscope; DDAN / M36 Sights; Laser Protected Periscopes; Muzzle Reference Sensor and others.