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MD
Resilient Power Works is a Maryland energy technology company collaborating with Pillar Innovations to bring its American-made power systems to market. The company focuses on helping utilities, municipalities, and other energy users strengthen local grid resilience through distributed generation.
ResinTech is a family company that began in a basement in the mid-1980s and now operates a major U.S. manufacturing campus in Camden, New Jersey. Its nearly 400,000-square-foot headquarters supports American-made water-treatment manufacturing for customers ranging from municipal systems to laboratories, with the main facility LEED Silver certified and production conducted under ISO 9001 standards. The company also maintains additional facilities that help serve customers in more than 100 countries.
Founded by Y. Maria Martinez in 2001, Respira Medical was a Mid-Atlantic home-care company known for its compassionate service to patients and clients. It provided respiratory care and home medical equipment before ceasing business operations on March 9, 2018.
Restoration East, LLC is a Mid-Atlantic contracting and structural restoration company specializing in reinforced-concrete restoration and protection. Its in-house fabrication shop designs and manufactures custom steel and metal components, including trench drains, grates, railings, supports, platforms, covers, brackets, and structural steel components, while providing concrete, structural steel, waterproofing, coatings, drainage, surface preparation, and façade restoration services.
Founded in 2004 by researchers, engineers, and patient advocates, Restorative Therapies develops integrated Functional Electrical Stimulation (FES) systems for neurological rehabilitation in clinics and homes. Its RT300 and Xcite2 devices use coordinated electrical stimulation to support repeated movement and task-specific therapy for people with paralysis and other neurological impairments. The company’s systems are now used in more than 1,000 clinics and 4,000 homes worldwide, backed by more than 20 years of clinical training and support.
Retiina is an engineering automation company that designs, manufactures, installs, and supports custom equipment for material handling and other demanding applications. Its systems pair machine vision and artificial-intelligence software with electromechanical engineering, including sortation and classification solutions built for specific customer facilities. In 2024, the company was named a USPS Supplier of the Year for its work integrating and installing Matrix Regional Sorters in Atlanta and Chicago, with installation continuing in Indianapolis.
Founded by law enforcement for law enforcement, Silicon Valley startup Revelen.ai builds AI-driven tools for firearm-crime investigations. Its ShotOptix handheld 3D scanner captures cartridge casings at crime scenes and sends them to an AI platform that can return investigative leads within minutes. The company’s team combines law-enforcement experience with expertise in artificial intelligence, engineering, and forensic technology.
RF Bay, Inc. designs, manufactures and sells high-performance RF and microwave components, giving engineers direct online access to U.S.-made hardware spanning frequencies from under 1 kHz to above 50 GHz. As an Ironwave Technologies company, it pairs direct purchasing with tailored, cost-conscious solutions for customer-specific requirements, backed by a one-year standard warranty.
From its Sun City Center, Florida base, RF Depot Inc. manufactures and sells custom coaxial cable assemblies and RF components, with assemblies made in the USA to customer specifications. The company offers standard configurations for quick turnaround as well as custom work, and tests products for electrical performance before shipment. Its IPC/WHMA-A-620 certification reflects the workmanship standard used for its cable and wire harness assemblies.
RFID Ready is an OEM and developer of automated, sensor-based RFID tracking systems. It manufactures and resells RFID tags, readers, antennas, portals, enclosures, components, handheld scanning equipment, and software applications, while providing RFID deployment, integration, consultancy, and support for manufacturing, healthcare, government, supply chain, data center, pharmaceutical, food, and personnel-tracking markets.
Founded in Baltimore in 1991 by Ron Hoff, RGH Enterprises remanufactures laser-printer toner cartridges and provides office products and related business solutions. The company remains rooted in Baltimore City, where Hoff owns the building that houses RGH alongside other small local businesses. RGH’s community focus includes its participation in Baltimore’s Live Near Your Work program since 2000 and its HUBZone certification.
Founded in June 2018, Edgewood’s RHS Precision is a small Maryland machine shop making CNC-machined components to tolerances as tight as 0.0002 inch. The ITAR-registered company handles work from prototype through production, with machining performed on-site and experience serving demanding aerospace, medical, and communications applications. Its team brings more than three decades of combined machining experience to projects ranging from small parts to larger jobs.
Founded in Arlington, Texas, in 1975 by chemist Dr. Paul J. Ricca, RICCA Chemical Company manufactures ready-to-use laboratory chemicals, analytical solutions and standards, including custom blends made to customer specifications. The company now operates three U.S. manufacturing locations and supports its products with ISO 9001:2015-certified facilities, ISO 17025-accredited laboratories and ISO 17034-accredited reference-material production.
Richfield Farm is a Manchester, Maryland farm known for connecting its harvest directly with local households through a community-supported agriculture program. Members receive weekly boxes of fresh local produce, while the farm also serves area markets and professional kitchens.
Founded more than 60 years ago by George W. Gohlinghorst, Ridge Printing Corporation has grown from a four-person shop into a Baltimore-region printing company employing more than 45 people. The family business remains centered on commercial printing while handling direct mail, design and fulfillment under one roof. Its on-site mail house can take a project from printed piece through addressing, postage and distribution, and many customers have stayed with Ridge for more than 30 years.
RING Container Technologies is a privately held, multinational manufacturer headquartered in Oakland, Tennessee, and has focused on sustainable consumer packaging for more than 50 years. It is one of North America's largest plastic container manufacturers, producing packaging for consumer goods and developing proprietary container technologies. Its operations include 19 North American locations dedicated to research, manufacturing, distribution, and management.
Founded in 1964, Rinker Materials is a QUIKRETE Company that manufactures concrete pipe, box culverts, precast products and related infrastructure products. The company became part of The Quikrete Companies in 2017 and integrated Forterra Pipe & Precast in 2022. Its more than 70 facilities serve over 35 U.S. states and eastern Canadian provinces.
Riot creates environmental graphics and large-format visual experiences that turn workplaces, venues, retail spaces, and event settings into branded environments. Operating as a business unit of ARC, the company combines custom fabrication and installation with a broad service-center network spanning more than 40 locations globally. Riot is also a nationally recognized Minority Business Enterprise, certified through the NMSDC and the Western Regional Minority Supplier Development Council.
Founded in 2020 by swim instructor Jose Gallagher, Rip Current Sports makes patented Dual Boards, a compact swim-training aid born from Gallagher’s work helping an adult student overcome a leg problem and learn to swim. The Maryland company also teaches swimmers and coaches through its IHM method, using the boards to develop balance, body position, and technique from beginner lessons through advanced training.
Rockville-based Rise Therapeutics develops oral immunotherapies that use synthetic biology to target dendritic cells and recalibrate immune responses in autoimmune disease and cancer. The clinical-stage company pairs its proprietary oral delivery platform with in-house clinical GMP manufacturing, taking candidates from discovery through human clinical validation. Its pipeline includes oral programs for ulcerative colitis, rheumatoid arthritis, and cancer.