At present, there are more and more patent infringement lawsuits, which shows that we pay more and more attention to intellectual property rights.
Back to the point,
First of all, in this case, you must first know whether your product has been patented or sold under the authorization of others. If there is, there is basically no need to worry about someone complaining about your patent infringement. Only you can say goodbye.
Secondly, your product is not patented, and you bought it from some channels. I wonder if these products have caused patent infringement. Then, you should first take all these products that are regarded as patent infringement off the shelves. While cooperating with the plaintiff's work, find a local law firm or agency (the kind that can handle intellectual property legal affairs) and try to negotiate as much as possible to minimize the trouble.
Finally, once again remind everyone that no matter what kind of products are sold in the future, we must first understand the patent attributes or trademarks of the products. Knowing more can try to avoid unnecessary trouble.