Patents, trademarks, and copyrights are all “intellectual property rights”. In addition to patents, trademarks, and copyrights, “intellectual property” also includes trade secrets, domain names, geographical indications, etc., but Amazon sellers are most often involved with patents, trademarks, and copyrights.
Next, let's talk about the differences between patents, trademarks, and copyrights.

This is a hole that many cross-border sellers have stepped into. What is unfortunate is that these sellers did not knowingly commit crimes; instead, they took the goods from the factory and sold them when they thought the design looked good. They didn't expect to suddenly receive copyright infringement complaints.