Patent and Invention Help Forum

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Topic Summary

Posted by: Brad
« on: June 22, 2017, 05:42:12 AM »

You can try to challenge their patent in something called Post Grant proceeding:

You may also be able to prove that you invented and were selling the product before they filed their patent which may cause their patent to be invalidated.

Posted by: JANUARY
« on: June 22, 2017, 12:36:33 AM »

Can a granted patent be cancelled if prior art was not discovered ?
Let's say I have been selling a new widget for some years and someone
else patents the same widget.
Can the original maker of the widget shout out or would it be too late ?