None of those piston engined aircraft were front line for long. They were in the stop gap role at best.
You're 100% wrong, especially with regards to the transport aircraft - look at the years they served.
In fact most of them ended up in Reserve or NG units while the jets were rolled out and produced.
Again wrong, it depended on what type of aircraft you're talking about. Air-to-air fighters, sure, bombers, to an extent (The B-36 was being built until 1954) but you had cargo and attack recips being built in the early 50s
With the exception of USN dedicated aircraft (due to early jet engine issues) name one piston engined fighter or bomber that was designed and built AFTER the 2nd world war ended.
None - but now you're altering your original statement...
Cargo and Maritime patrol dont count..... only fighter and bombers.
Why not???? - again that's not what you originally said. You're exact words -
"Who cares what happened after 1945. Anything with a piston engine after that year was obsolescent."
You said A-N-Y-T-H-I-N-G! Not fighter, bomber, transport, navy or air force - ANYTHING!
You fail to realize that the recip stayed around because....
1. they were reliable
2. there was fuel for them
3. they were still useful
4. there were many of them on hand
No one can argue that for front line fighters and bombers the jet was overtaking the recip, it just didn't happen over night, and as pointed out the USAF didn't become an all-jet bomber force until 1960. Even during Vietnam, with all the F-100s, F-105s, and F-4s buzzin all over the place the USAF had to make use out of Skyraiders and B-26s (Douglas) because they realized their dedicated jet ground attack aircraft could not loiter in a combat zone like an old recip. It wasn't until the A-10 came along when that deficiency was corrected.
It took a good 15 years before the USAF and USN started pushing the last of their recip combat aircraft out to pasture. The navy held on to theirs because of problems with early jet engines (something you pointed out AFTER your initial errored statement). Again Sys - you made a statement and now you're trying to backpedal.....
Oh by the way - we were only talking about the US - I didn't go into other countries who produced recip combat aircraft after WW2 like the Lavochkin La-11, the Hispano HA-1112, The Bristol Brigand, the DeHavilland Hornet, the Blanbun Firebrand and the Hawker Sea Fury, all went into service in 1946 or later AFAIK.