Ahhh, so it’s a Yank invention… :^) Fred Street -- Minneapolis S/V Oceanis (1979 C&C Landfall 38) -- on the hard in Bayfield, WI :^(
On Nov 8, 2013, at 10:24 AM, Ken Heaton <kenhea...@gmail.com> wrote: > Although a square-socket drive had been conceived decades before (having been > patented in 1875 by one Allan Cummings of New York City, U.S. Patent 161,390)
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