Alexander Lippisch, and the Delta Wings
Many more German scientists came to the US as the exploitation program called "Project Paperclip" finally came to be implemented after a lot of red tape-
"War booty" as they called it included many supersonic wind tunnels brought to the US
Siegfried Gunther was a german designer who along with many more(about 6000)scientists, designers, engineers and technicians went to work in the Soviet Union instead. Some were offered more lucrative contracts, Gunther designed the Mig-15