

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.
So, victory gardens.