The invention of the TWT is widely attributed to Rudolf Kompfner in 1942--1943, although Nils Lindenblad, working at RCA (Radio Corporation of America) in the USA did patent a device in May 1940 that was remarkably similar to Kompfner's TWT.
The invention of the TWT is widely attributed to Rudolf Kompfner in 1942--1943, although Nils Lindenblad did patent a device in May 1940. This device in May 1940 was remarkably similar to Kompfner's TWT. Nils Lindenblad is working at RCA (Radio Corporation of America) in the USA.