I made a little research about it, and it is a bit more complicated.
Satoshi didnt invent blockchain, but he created the first blockchain. Those people you mentioned just wanted to create one, but thy didn't.
"The first work on a cryptographically secured chain of blocks was described in 1991 by Stuart Haber and W. Scott Stornetta.[6][11] They wanted to implement a system where document timestamps could not be tampered with. In 1992, Bayer, Haber and Stornetta incorporated Merkle trees to the design, which improved its efficiency by allowing several document certificates to be collected into one block.[6][12]
The first blockchain was conceptualized by a person (or group of people) known as Satoshi Nakamoto in 2008."
https://en.m.wikipedia.org/wiki/Blockchain