Here you can search for product patents
https://www.google.gr/?tbm=pts&gws_rd=cr%2Cssl&ei=R4wOVa-ALsP3UO3jg5gH
https://www.google.gr/?tbm=pts&gws_rd=cr%2Cssl&ei=R4wOVa-ALsP3UO3jg5gH
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