Who invent wireless devises?

Answer 1

No one invented wireless electricity, and I don't quite understand what you mean by that in the first place. There's something called electro-magnetic radiation, which is the basic physical phenomena behind radios for instance. But so far it's proven very hard to transmit any useful power that way. But using it for communication works fine.

Nikola Telsa was transmitting 100 million volts of high-frequency electric power wirelessly over a distance of 26 miles at which he lit up a bank of 200 light bulbs and ran one electric motor! This was in 1899, why we don't have wireless electricity more than a hundred years later is beyond me. If only the HARRP coils could be proven to make this possible.

Answer 2

Guglielmo Marconi invented the first wireless device, the wireless telegraph, in 1935.