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About Us
* PATENT FOR SELL *
TO WHOM IT MAY CONCERN
patent reusable hot/cold gel packs of changeable color .
these gel packs are similar to all gel packs in the world used for hot and cold therapy , but It is unique in : It has the ability to change Its color by heating or cooling .
At room temp., It has a rose color . and by heating it takes different grades of pink color according to the temp. reached . and by cooling It becomes colorless .
It is composed of very cheap raw materials .
It is ...
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