In 1921, Lewis Reisner, who had worked with Bellanca at Maryland Pressed Steel, founded Reisner Aero Services, a company that serviced and sold aircraft. Four years later in 1925, Reisner and Ammon Kreider, a local shoe manufacturer, formed the Kreider-Reisner Aircraft Company on Pennsylvania Avenue in Hagerstown.

In 1926 the Kreider-Reisner Aircraft Co built the KRA Midget, a small racing plane that won the Scientific American Trophy Race held in Philadelphia in September 1926. In 1927 built the Challenger three-seat open-cockpit biplane using the cheap Curtiss OX-5 (or other) engine. Smaller two-seater also made. In April 1929, Fairchild acquired 82% of the common stock in Kreider-Reisner, making the Hagerstown company a subsidary of the Fairchild Aviation Corporation, which eventually became Fairchild Aircraft Company. The Kreider-Reisner types were added to the Fairchild series, the Challengers then being known as Fairchild KR biplanes (Challenger C-6 was KR-21; C-4 was KR-34). As a division of Fairchild Aviation Corporation in the mid-1930s Kreider-Reisner built the Fairchild 22 two-seat open-cockpit monoplane and the Fairchild 24 cabin type, also producing the Fairchild 71 amphibian.

While attending the Second Aircraft Show in Detroit, Michigan, Kreider was killed when his plane collided with another aircraft at Detroit Ford Airport on 13 April 1929.