AbstractThis study researched the patents published from 1942 to March of 2014 of Aerojet Company (including Aerojet Rocketdyne Company's patents) in USA, considering Aerojet's annals and other information, analyzed relationship of the patents and the course of Aerojet's business development, and the technology R&D process, and extracted the key hypersonic technologies of Aerojet Company, at last raised the conclusion
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