Spot on Frank whittle invented the jet engine , but our country would not give him the patent of his jet engine it was then abused and used by the USA and other countries sadly he lost out, as did the UK industries for production......Frank Whittle had the first working engine, it was knocked back by the RAF so he had to set up his own company allowing the actual first flight to be made by a german.
French engineer Maxime Guillaume was granted a patent for a simple jet engine before them both but never got it into construction , although the design looks workable.
Nothing changes we carry on selling the family silver ........