

Please don’t lump trademarks with the rest. Makers have stamped their goods with their mark since ancient times, both as advertising and to signify quality products (and not knockoffs). Swords were especially commonly marked with the smith’s trademark.
It was illegal to sell bread in ancient Rome without a trademark, for example. The punishments for doing so were harsh, as they wanted to be able to track down the baker if someone sold tainted bread.
In modern days, they’re useful for customers to know what company they’re buying from.
My unfounded guess is that they sell products that normally compete with a soon to be crippled US market, so their products can fill the void. Think car sales from China to the EU after the tarrifs cripple manufacturing, for example.