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His name is "Leibniz" not "Liebnitz". Sorry but that's two mistakes in a seven character word.

Per the first paragraph of the article, Harriot at the very least beat Leibniz by a century or so.

But it appears Leibniz gave credit to the ancient Chinese.

Sounds like Harriot invented it independently and didn't know about the ancient Chinese.

They didn't do anything meaningful with it.