A - Human Necessities – 63 – C
Patent
A - Human Necessities
63
C
A63C 19/04 (2006.01) E01C 13/02 (2006.01) E01C 13/08 (2006.01)
Patent
CA 2177235
An artificical surface having at least one compartment with a filler therein has the filler held in position by a vacuum.
Weber Edward A.
Weber Edward A.
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