Rotary moulding
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Mar 13, 2012
Grant Date -
Oct 22, 2009
app pub date -
Jun 17, 2009
filing date -
Jan 15, 2004
priority date (Note) -
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Abstract
A valve in a mold as to provide a potential airflow pathway either way, the valving having at least a substantially closed condition from which it can be opened by a pressure differential in one direction that is below that which will cause it to open or fail to allow an airflow in the other direction.
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