 The last Frog-branded kits were produced in 1976, whereupon many of the Frog moulds were sold to the Soviet Union and marketed under the Novo name.Founded in 1931 by Charles Wilmot and Joe Mansour, International Model Aircraft Ltd. (IMA) originally used the "Frog" brand name (said to stand for "Flies Right Off the Ground") on the "Interceptor Mk.4" semi-scale rubber-band powered flying model, launched the following year.Also in 1932, a marketing partnership with the toy company Lines Bros Ltd. was formed and other Frog brand flying models followed.