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Posted by Stan Schulz on December 27, 2007, 3:48 pm, in reply to "g.m. co. unbreakable combination tool"
216.170.15.162
Go to DATAMP, look at the entry for D172,968
(http://www.datamp.org/displayPatent.php?id=13797). It usually surprises people to learn this thing came out in the 1950s.
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