Lou Ottens, inventor of the cassette tape, RIP

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Another article about his achievements here (I posted it on the Dead Celebrity thread before seeing Pesco post about it on the main page.)

Dead Celebrity (Part 1)

Dutch inventor of the audio cassette tape dies aged 94 - DutchNews.nl. Lou Ottens, inventor of the cassette tape and a CD pioneer died aged 94 at his home in Duizel in Brabant on Saturday, Dutch media report. Ottens, who studied to be an engineer, started working for Philips in 1952. Eight years later he became head of the firm’s recently introduced product development department. Within a year he and his team had developed the first portable tape recorder of which over a million were sold. Tw…

He also invented the CD!