Approximately how many years before Marconi's famous 1896 transmission did Bose publicly demonstrate wireless signaling?

Answer

Approximately two years prior

Bose publicly demonstrated the use of electromagnetic waves to transmit signals over a distance in 1895, which occurred approximately two years before Marconi’s famous transmission in 1896.

Approximately how many years before Marconi's famous 1896 transmission did Bose publicly demonstrate wireless signaling?
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