At 08:11 17 September 2019, wrote:
Of more interest to pilots.... Canadian Reginald Aubrey Fessenden was a
pro=
lific inventor in the area of wireless technology =E2=80=94 he was the
firs=
t to broadcast on the AM radio band in 1900 =E2=80=94 although he's often
r=
egarded as an unsung hero in Canada because his inventions in radio
technol=
ogy were outshined by Italian inventor Guglielmo Marconi. Fessenden built
t=
wo-way radio transmission towers =E2=80=94 one near Boston and the other
in=
Scotland =E2=80=94 and issued the first transatlantic radio broadcast in
1=
906.

Tesla filed his own basic radio patent applications in 1897. They were
granted in 1900.

Marconi's first patent application in America, filed on November 10, 1900,
was turned down. Marconi's revised applications over the next three years
were repeatedly rejected because of the priority of Tesla and other
inventors.