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Old 11-14-2009, 05:44 PM
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Peter Spaeth
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Alan Hager did invent, or at least claimed to and received a patent for, the first "slab" as we know it.

http://www.freepatentsonline.com/4979619.html

Last edited by Peter_Spaeth; 11-14-2009 at 05:45 PM.
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