Comment by esquivalience
4 hours ago
In the business, we often refer to that sort of reminder activity as "defending" against genericism. Practice varies by country but the point is often to show that you are not passively allowing the trade mark to become generic. Yes, you can often ignore letters (unless they request an answer or make a threat, which might be a different situation) - but it's usually a good idea to spend some time looking at it from the other person's perspective first.
Yeah, but there are a TON of things that trademark lawyers do that are counter-productive. I put vaguely aggressive letters from trademark owners in that category, such as Monster energy drinks thinking they get to control how others use the word "monster."
I remember when the Apple logo stickers Apple packed in had a little (R), which was later dropped, since it's ugly and not legally required. But no doubt some lawyer advised putting it there to begin with.