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Why is it called a "kelly" drive? Presumably it was invented by someone with the surname Kelly, or by a company by that name. A bit of history would be helpful in the article, and perhaps some patent references.— Quicksilver T @ 19:36, 18 May 2010 (UTC)
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Why is it called a "kelly" drive? Presumably it was invented by someone with the surname Kelly, or by a company by that name. A bit of history would be helpful in the article, and perhaps some patent references.— Quicksilver T @ 19:36, 18 May 2010 (UTC)