PatentBrief

Inventor

G Chastain

Patents indexed

1

Year range

1973

Associated with

Years active

1973

Total patents

1

Most recent

1973

Frequent collaborator

T Barnes

Domains

consumer_electronicssoftwarefinancesemiconductors

Activity by decade

1970s
1

Patents

1

Career timeline

1 patents, in 1973

Dot size = forward citations

19731974

Hover or tap any dot to see the patent. Larger dots indicate more forward citations — a proxy for downstream influence.

US 3761682·1973·Docutel Corp

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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