To be fair, the answering machine was suppressed by Bell Labs, even though magnetic tape recording was invented in the 1930s. https://www.jstor.org/stable/3106

To be fair, the answering machine was suppressed by Bell Labs, even though magnetic tape recording was invented in the 1930s. https://www.jstor.org/stable/3106703 https://www.jstor.org/stable/3106703