PD-20 · US 395,782
Art of compiling statistics
Original patent print · 1889
Hollerith's punched-card tabulator, 1889 — built for the U.S. census, seed of the company that became IBM.
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US 395,782Art of compiling statistics1889
- Inventor
- Patented
Total29 €
PD-20 · US 395,782 · Filed September 23, 1884 ·
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Common questions
- Is this a real patent?
- Yes — the original drawing as filed at the U.S. Patent Office, cleaned and printed. Public domain by law.
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