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Docutel Corp

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Year range

1973

consumer_electronicssoftwarefinancesemiconductors

Key Inventors

T Barnes1 G Chastain1 D Wetzel1

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1 patents, in 1973

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1973 — Early Automatic Cash Dispenser Using Credit Cards

US 3761682·1973

Early Automatic Cash Dispenser Using Credit Cards

This 1973 patent describes a machine that dispenses cash using a coded credit card, verifies the card's validity, and updates its code after each transaction to prevent fraud.

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Docutel Corp

1 patents, in 1973

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