Hi Nod,
>sorry, I stick to WWII. IE Willy mescher****, Georing (the fat one), Kurt tank, and people like pilots like Dolittle and Zeamer.
The true core about this might be that the Horten flying wings were aerodynamically ahead of their time in 1945, and Northrop may have benefitted from that even if he didn't get the original idea from the Hortens.
With regard to stealth, there is no doubt that the Germans were aware of RAM technology in WW2. However, contemporary radars (especially the early warning radars) weren't particularly capable, so it didn't take much to hide an aircraft that by modern standards wouldn't be considered "stealthy" at all :-)
Regards,
Henning (HoHun)