Landell began experiments in wireless communication in Campinas and São Paulo in the period 1893-1894. A biographical review recounted that he "...invented his apparatus in Porto Alegre, and as soon as he arrived in São Paulo in 1896, he began with preliminary experiments, to achieve his object -- to transmit human voice through the air.

Reported demonstrations

The June 10, 1900 issue of the Jornal do Commercio reported that on June 3 Landell made a public

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