An inventive genius, Coates revelled in introducing new ideas in his work. Among his innovations was the '3-2'
architectural plan, where two living rooms on one side of the building are equivalent in height to three rooms on the other side, making two units vertically on three floors. in 1928, he designed the "D-handle", an elegantly simple door handle design commonly employed, for example, in Scandinavian furniture. In 1930 he also designed a studio for the
British Broadcasting Corporation, and among his technical designs was a microphone stand featuring an overhead counterbalanced arm that enabled the microphone to be moved to any part of the studio while remaining perfectly balanced. The design became a standard piece of equipment at the BBC. Coates also designed the distinctive and influential round
bakelite cabinets used by
EKCO for some of its radios during the 1930s. Featured in the
V&A permanent collection, the Museum notes of the design of Model AD-65: "the severe geometric shape defined the visual vocabulary of radio design for many years". The thirties were his most prolific era. The Isokon was immediately followed by
Embassy Court in
Brighton (1935) and
10 Palace Gate, Kensington (1939). These were the only apartment buildings he would design. He also had several private home commissions. illustrates Coates' 3-2 architectural plan. During World War II, he again served with the RAF, this time working on fighter aircraft development, for which he was later appointed an
Officer of the Order of the British Empire (OBE) in the
1944 New Year Honours. The same year, he was appointed a
Royal Designer for Industry (RDI). Following the war, he, like some other well known architects including Gropius and Breuer (by then working in America), contributed to the British post-War housing effort by introducing an early scheme for modular housing he called Room Unit Production. In 1949-50, he designed the building of the
Telekinema for the
Festival of Britain's South Bank Exhibition. This 400-seat, state-of-the-art cinema, specially designed to screen both film (including the first 3-dimensional films) and large-screen television, proved one of the most popular attractions of the South Bank Exhibition in the summer of 1951. Operated and programmed by the
British Film Institute, it re-opened as the
National Film Theatre in October 1952, until its demolition in 1957 as the NFT was relocated a stone's throw away from its original site, under Waterloo Bridge. He also designed a remarkable boat, called the Wingsail. It had a rigid sail design mounted on a catamaran hull. Though he formed a company to market the design, it was not a success, as both the sail and the catamaran were ahead of their time. He is less well known for his planning work. In 1937, he undertook planning for a
slum clearance in Britain (not implemented). In Canada (1952–54) he prepared plans for
Iroquois New Town on the St. Lawrence River in eastern Ontario which were also not implemented (the design was awarded to others). He also prepared plans for a Toronto Island Redevelopment Project, and was a participant in the
Project 58 urban redevelopment scheme for Vancouver. ==Final years in Canada==