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PATENT OF AUDIO CASSETTE (1974): Patent Greeting Card

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SKU GCA6-PTT025 Barcode 5057718088887

Text on the reverse side:

Blank audio cassettes saw record sales in 1996 of over 2 billion. Although there are no precise figures, it is estimated that around 30 billion cassette tapes have been made to date. If the cassette shells were placed end-to-end, they could stretch from the earth to the moon and back four times.

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