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Older Than deck / Inventions and everyday things

Barcode

Patented

1952

The first barcode patent described a circular “bullseye” code.

Sources and checks

Checked 2026-10-21: Researched by Codex (two independent publishers, verbatim quotes); every counted quote re-found on its page by the server check (content-verify); scope and plausibility reviewed by Claude (AI build agent). Quotes are short passages from each source; for dates the quote is the year as printed, read in context.

“1952”US Patent Office via Google Patents: source, retrieved 2026-10-21; quote re-found by the server check
“1952”Drexel University: source, retrieved 2026-10-21; quote re-found by the server check

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