My understanding of the trademark law, as an owner of several trademarks, is that once the owner becomes aware of someone using the trademark, it is my responsibility to protect the trademark. If I do not defend the trademark against everybody, I cant defend the trademark against anybody. My obligations as the owner is to 1) use the mark (and be able to show documented examples of continual use) and 2) defend it.
This is why you see all these momnpop operations getting letters about infringement. Its also why you see major corporations like P&G or Coke or LOreal suing their distributors like Costco or Walmart over store brand packaging. If Coke lets Walmart of Safeway put their store brand cola into a specifically color red can with script writing and a capital C for cola that waves the length of the can under the work cola
theyre gonna get a letter and maybe a lawsuit if they ignore the letter. Seems weird to sue your biggest customer but it happens all the time for the same reason Starbarks or Sonys get a letter. The law makes not accommodation for little guys infringing.
And if Coke doesnt defend it against Walmart today
next week, when Pepsi puts their color in a package like that and Coke DOES sue Pepsi
Pepsis defense is but they let Walmart do it
.and thats how former trademarks like refrigerator, aspirin, escalator, and AppStore became generic. Its also why you hear the phrases Kleenex BRAND tissues or Xerox BRAND copies
these guys are trying make sure their trademarks dont become generic through use as a general noun or very.
IANAL but have been schooled on this one (a lot) about my responsibilities as an owner.