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Diamondback Signal, LLC brings experienced railroad signal personnel to short line and regional railroads, handling crossing-signal inspections, maintenance, and new installations. Its turnkey approach covers a crossing-warning project from survey and engineering through wiring, installation, and final testing, while its field staff provide responsive troubleshooting and FRA-required inspection programs. The company also maintains detailed equipment and office records to help railroad managers prioritize repairs and replacements.
DiamondBack Truck Covers began as a Penn State engineering-class project in 2003, then grew from its founders’ garage into an American manufacturer rooted in Philipsburg, Pennsylvania. The company is known for making its truck-bed covers in the USA while investing in local mentorship, volunteer work, and a shortened paid workweek that gives employees more time with their families.
Since 1990, Diamonex has developed diamond-like carbon and polycrystalline diamond coating technologies for components operating in demanding environments. The Allentown company combines its own ion-source and deposition processes with application engineering to tailor thin, conformal coatings, including its patented DIAMONDSHIELD® treatment for plastics and engineered Phoenix® CMP pad conditioners for semiconductor wafer fabrication. Its R&D team has generated more than 46 patents.
Diapulse develops and supplies a clinically validated Class III pulsed radio frequency energy device designed to support soft-tissue healing and recovery without drugs. Its technology is backed by more than 60 years of peer-reviewed research and has been used in applications ranging from postoperative recovery to burn care and athletic rehabilitation.
Diaz Manufacturing makes custom solid-wood cabinet components in the United States, drawing on a trade-focused operation built around controlled supply, manufacturing, and shipping chains. Its products are made to order, with the company highlighting in-house hardwood processing and a standard two-week lead time.
Founded by Ronaldo Diaz in 2005, Diaz Sheet Metal, LLC fabricates custom ductwork and provides HVAC and plumbing services for Maryland homes, businesses, and industrial projects. The Hyattsville company stands out for pairing CNC-assisted, SMACNA-compliant duct fabrication with mechanical service, including rapid-response support for urgent plumbing and HVAC needs. It is Maryland licensed and insured and identifies its specialty as precision custom ductwork.
DiCarlo Digital Copy Center is a Salisbury, Maryland shop known for combining practical print work with the preservation of older media. It serves local customers who need everyday copying as well as specialized help bringing photographs and other personal records into usable digital form.
Since 1990, Dice’s Creative Cakes has baked and decorated custom wedding and celebration cakes in Boyertown, along with fresh pastries and dessert trays. Founder and owner Mary Dice formulates the bakery’s recipes, including its moist fine-grain pound cake and house-made whipped buttercream, while the in-house selection has grown to more than 40 wedding cake and filling flavors. The bakery also accepts advance orders for specific allergen-free items, including gluten-free cakes.
For more than 39 years, Dick’s Concrete Company has supplied ready-mix concrete and construction aggregates to residential, commercial, industrial, and government projects throughout the Hudson Valley and the surrounding tri-state area. Founded by Dick and Bonnie Penaluna, the privately held company pairs a family-built reputation with a fleet of 25 mixers and 25 dump trucks. Its New York State DOT-approved laboratory includes an ACI-certified quality-control team and the Hudson Valley’s only ready-mix company-owned compressive break machine.
Established by the Divine Brothers in 1892, family-owned Dico Products makes metal-finishing supplies, including buffing wheels and compounds, along with its distinctive Nyalox abrasive brushes and power-tool accessories. A division of Divine Brothers Co., Dico manufactures and packages its buffing wheels and compounds in the USA and serves both industrial users and homeowners through retailers and online channels.
Founded by Don and Jill Didion in 1977, Didion Vessel is a family-owned Bellevue, Ohio manufacturer of custom ASME pressure vessels, industrial autoclaves, and gas separators. The company grew from local welding and millwright work into code fabrication, earning its ASME stamps in 1989 and later certifying more than 3,100 vessels. Its experience with rigging and in-house fabrication also allows Didion to tackle unusually large, heavy custom units, including vessels built in its yard when they exceed shop dimensions.
Since its founding in 1970, Die Craft Machining & Engineering has grown from a small machine and die shop into a Cincinnati contract manufacturer. Current management acquired the company in 2000, later moving it into a 32,000-square-foot facility and building a reputation for solving difficult industrial parts and equipment needs. The company is ISO 9001:2015 certified and has used waterjet technology since 2001.
Founded by Tom Maxwell in 1974, Die Quip Corporation began as an equipment builder to make die finishing faster and easier for in-house die shops. The family business is now run by his sons, Tom and Scott Maxwell, and designs and builds equipment for working tungsten-carbide drawing dies, with a stated focus on rigid machine platforms and repeatable heavy cutting. Its products serve the wire, bar, and tube drawing industries.
Die Sets, Inc. manufactures standard and custom die sets, including steel and aluminum die-shoe versions. Its facility uses CNC flame-cutting equipment, rotary grinders, and CNC machining centers to produce sets to customer drawings or CAD files, with machining operations available as part of the work.
Established in 1944, Cleveland-based Die-Cut Products Company makes custom gaskets, shims and precision fabricated parts for customers around the world. Its specialty is tight-tolerance shim manufacturing—serving customers for three generations—as well as die-cut nonmetallic components and thin-gauge metal stampings. The company works from prototype quantities through full production under one roof, supplying sectors including aerospace, healthcare and defense.
Akron-based Die-Gem Extrusions specializes in small custom plastic profiles for OEM manufacturing, particularly parts measuring roughly 0.25 to 1.5 inches. The company combines profile design, extrusion and in-line finishing—such as printing, adhesive application and cutting—to deliver parts ready for production, with just-in-time stocking available for cyclical shipments. Die-Gem also operates KEL-EEZ Weatherization as a division focused on weatherization sealer products.
Since 1958, third-generation family-owned Die-Matic Corporation has produced precision metal stampings, tooling and finished assemblies for manufacturers from its Ohio facility. Its in-house team carries projects from progressive die design and prototyping through welding and assembly, supporting production volumes from 5,000 to 10 million pieces. Die-Matic is also an employee-owned company, with ISO 9001 and IATF 16949-certified quality systems.
Family-owned since 1946, Die-Matic Products LLC has built its identity around precision metal stamping for demanding government and industrial customers. The Plainview company operates from a 30,000-square-foot factory and is especially known for supplying parachute hardware to the U.S. government, its contractors, and sport-parachute manufacturers.
Founded in 1986, Die-Mension Corporation is a Brunswick, Ohio precision manufacturer that designs, builds, and repairs tooling while producing machined components and metal stampings. Its capabilities span work from prototype through production, including wire EDM, grinding, and high- and low-volume stamping. Die-Mension is ISO 9001:2015 certified with design and is a WBENC-certified women’s business enterprise.
DIE-TECH is a Pennsylvania metal stamping manufacturer established in 1974, specializing in precision stamped components and metal microstamping. The company is a second-generation, family-owned business and describes itself as privately held; it works with customers from engineering and prototyping through production. Its stamped parts serve industries including medical devices, automotive, telecommunications, nuclear, military, and aerospace.