The first automobile with a horn would have been put there by Henry Ford. Horns have been used for a very long time. I'm afraid you'll have to be more specific.
I invented the car horn
It wasn't invented but evolved from early horns. The earliest horn was a hunting horn. These date from the 16th century .
The French Horn was invented in 1753, it was invented because it was used for commutation and for the beautiful sound it made.
1903
the french!
it was in1760
no
abut 1720
It was invented in Poland. But we are retards so we dont know
Sir Julian Horn-Smith
Two years ago
Air horn.