A.k.a. Zip-A-Tone. A brand of transfer lettering by Para-Tone Inc., with headquarters in Hillside, Illinois and offices around the world. A 1974 catalog lists 28 sans serif faces, 34 serif faces and 60 modern/display/decorative faces, only few of which were original designs. Introduced the “Designers Fonts” trademark in June 1979 [USPTO].