# T Barnes — Patents explained on PatentBrief

T Barnes has 1 landmark patent explained in plain English on PatentBrief.

- [Early Automatic Cash Dispenser Using Credit Cards](https://patentbrief.org/patent/us/3761682/atm-cash-dispenser) — granted 1973
  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.

**Full profile:** https://patentbrief.org/inventor/t-barnes

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_Source: PatentBrief — https://patentbrief.org. Plain-English explanations of US patents._