Defunct companies based in Dayton, Ohio

The Duriron Company is an industrial component manufacturer of such products as automatic control valves, valves and actuators, pumps, sealing systems, filtration equipment, pipes and fittings. The company was incorporated in 1912 as the Duriron Casting Company in Dayton, Ohio by John R. Pitman, William E. Hall, and Pierce D. Schenck.

The Davis Sewing Machine Company began in 1868 in Watertown, New York, and moved to Dayton, Ohio, around 1890.

Schenck and Williams was an architectural firm in Dayton, Ohio. The firm's projects included the Hawthorn Hill home for Orville Wright and his sister and father, the Dayton Young Men's Christian Association Building, and the Engineers Club of Dayton building. The firm's partners were Harry J. Williams and Harry I. Schenck, both 1903 Cornell University graduates and members of the American Institute of Architects Several other Cornell graduates including Nelson J. Bell (1904), Robert E. Schenck (1912), Albert R. Reilly (1914), Wolfe Marcovitch (1915), Leslie L. Lambert (1916), Ernst W. Kurz (1917) and Ellason R. Smith (1917) came to work for the firm.

Kauffman Motor Vehicle Company was a pioneer brass era, American automobile company, built in Miamisburg, Ohio, from 1909 until 1912.

The Dayton-Wright Company was formed in 1917, on the declaration of war between the United States and Germany, by a group of Ohio investors that included Charles F. Kettering and Edward A. Deeds of Dayton Engineering Laboratories Company (DELCO). Orville Wright lent his name and served as a consultant, but other than that, the location of one of its three factories in the original Wright Company factory buildings in Dayton, Ohio was the only connection to the Wright brothers. In addition to plant 3 (the former Wright Company buildings), Dayton-Wright operated factories in Moraine (plant 1, the main factory) and Miamisburg (plant 2), Ohio. During the course of the war, Dayton-Wright produced about 3,000 DH-4s, as well as 400 Standard SJ-1 trainers. The company was hurt by the reputation of the DH-4s it produced as "flaming coffins" or "flying coffins", although they were not in reality more subject to catching fire than other aircraft, and by scandals it faced.

The Speedwell Motor Car Company was a Brass Era American automobile manufacturing company established by Pierce Davies Schenck that produced cars from 1907 to 1914. The Great Dayton Flood of 1913 greatly damaged the Speedwell factory and inventory, and the company entered receivership in 1915 after having built an estimated 4,000 cars and trucks.

The Rike-Kumler Company (commonly known as Rike's) was an American department store in Dayton, Ohio. In 1959, Rike's became part of the Federated Department Stores conglomerate. In 1982, Federated merged Rike's with its Cincinnati unit, Shillito's, in order to form Shillito–Rike's. In 1986, Federated merged Shillito–Rike's into the Columbus-based Lazarus chain, which, in 2005 was consolidated with most other Federated chains under the Macy's brand.

The Stinson Aircraft Company was an aircraft manufacturing company in the United States between the 1920s and the 1950s.

The Apple Eight was a short-lived American automobile manufactured by the Apple Motor Car Company in Dayton, Ohio, from 1915 to 1917. The Apple 8 model cost $1,150 and had 44 horsepower (33 kW). An inline eight-cylinder engine and three-speed transmission were in a unit. Well-tested standard vendor parts were used. The body had a 118 inches (300 cm) wheelbase and could seat five. It was advertised as a luxury car and used the slogan "No hills too steep. No roads too rough".

Stoddard-Dayton was a high quality car manufactured by Dayton Motor Car Company in Dayton, Ohio, US, between 1905 and 1913. John W. Stoddard and his son Charles G. Stoddard were the principals in the company.