In reference to the patent: US8602429
Is this patent Valid? There are a lot of manufactures wordwide who sells exact this product. Can someone check for me if there are any issues going on with this pattent?
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It is an issued patent. The fees are up to date. You can check the status yourself on the public PAIR site. If you have evidence that the invention is being practiced in the wild; the cup suspension device may have been licenced, transformed into a company that manufactures the device or simply the patent is being ignored and the owner is not pursuing legal means to protect their patent.