Frisbee Plastics, the original molder. After learning that he could produce his own disc more cheaply, in 1955 Morrison designed a new model, the Pluto Platter, the archetype of all modern flying discs. He sold the rights to Wham-O on January 23, 1957, and in 1958 Morrison was awarded U.S. Design Patent D183,626 for his product. In June 1957, Wham-O co-founders Richard Knerr and Arthur "Spud" Melin gave the disc the brand name "Frisbee" (pronounced "friz'-bee") after learning that Northeastern college students were calling the Pluto Platter by that term, which derived from the name of the Connecticut-based pie manufacturer, Frisbie
Estradiol enantate a variety of other estradiol esters, by Karl Junkmann of Schering AG in 1953. The first clinical study of estradiol enantate and DHPA as a combined injectable contraceptive was conducted in 1964. The combination was marketed by the mid-1970s. "Estradiol enantate" is the English generic name of the drug and its and , while "estradiol enanthate" is its . Its generic names in other languages are as follows: Estradiol enantate is also known by its former developmental code name "SQ-16150". It has been referred to as "estradiol heptanoate". Estradiol enantate has been marketed under a wide variety of brand names.