[ganesh7]

Uhuh:

"The Junkers Ju 49 was a German aircraft designed to investigate high-altitude flight and the techniques of cabin pressurization. It was the world's second working pressurized aircraft, following the Engineering Division USD-9A which first flew in the United States in 1921.[1] By 1935, it was flying regularly to around 12,500 m (41,000 ft)."

[dTal]

What on Earth is your argument? Everyone was experimenting with cabin pressurization - that wasn't even the first one. Are you seriously suggesting that that specific aircraft - a pre-war, single-engine piston craft - in any way influenced the design of the Comet?

https://en.wikipedia.org/wiki/Cabin_pressurization#History