Amazon sellers can determine appearance patent infringement by following the steps below:

First, check the appearance design of the product, compare the appearance of the original product and the merchant's product, and confirm whether there is any similarity.

Second, check whether there are similar products on the market and check whether these products already have appearance patents.

Finally, you can use professional search tools to search for relevant patent status to confirm whether the merchant's products infringe on the appearance patent rights of others. Once merchants are found to have infringed, they may be required to stop selling products and bear the legal responsibilities and compensation caused by this.