Walter Frederick Morrison disc more cheaply. In 1955, he and Lu designed the Pluto Platter, the archetype of all modern flying discs. On January 23, 1957, they sold the rights for the Pluto Platter to the Wham-O toy company. Initially Wham-O continued to market the toy solely as the "Pluto Platter", but by June 1957 they also began using the name "Frisbee" after learning that college students in the Northeast were calling the Pluto Platter by that name. Morrison also invented several other products for Wham-O, but none were as successful as the Pluto Platter. Morrison and his wife, Lu Nay Morrison had
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.