Suction device for cleaning a bottom surface of a structure of at least 15,000 m.sup.3
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United States of America Patent
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Dec 6, 2011
Grant Date -
Mar 17, 2011
app pub date -
Sep 17, 2010
filing date -
Nov 21, 2006
priority date (Note) -
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Abstract
for recreational use, with color, transparency and cleanness characteristics similar to swimming pools or tropical seas, said device operating by suctioning impurities from the bottom surface by a pumping system of said the structure.
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