Now this might be a tough one.
Frank Lockhart and his crew are credited with introducing the intercooler within US racing and at Indy.
reading Mark Dees' Miller bible (my all time favorite book about Indycar history) tells you he more or less invented it.
Because: back in 1925 the FIAT company of Italy built supercharged 2 liter GP cars which had a crude intercooler already. One such car appeared at Indy in 1925, Pietro Bordino finishing 10th with it.
Had Lockhart ever heard of the FIAT's using such a device?
Or is this just indeed another case of several inventors developping the same thecnology, without knowing about another.
BS: this is no attack on Lockhart. I love "Indy's golden era" very much and Lockhart's achievements make me wonder what we would have seen had ne not gone for that LSR project. But I just wonder if he had any influence by others after all.