But very occasionally someone comes up with something unique and hopefully gets some credit for it.
I am a habitual doodler and have possibly drawn hundreds of thousands of knife drawings. When I do my internet "research" I discover that largely coincidentally, I've drawn up some of the designs that many makers are using as their signature pieces. I also wonder if subliminally, I've had ingrained into me particular pattersn that have been outstanding and I keep coming back to those.
Thankfully, we're all individuals and while it could be easy to make a similar design knife, it is actually extremely difficult to make an identical one. And that applies to some of my own knives too ! Especially when I'm not using moulds, specific templates etc.
However, there are some spectaculr examples of TRUE KNOCK-OFFS. One example is when a low-cost maknufacturer actually goes out to intentionally copy eg.- an Ontario Spec Plus design, Emerson, KaBar, Cold STeel, (Strider has been a recent victim of this) and makes one in an inferior steel / inferior fit and finish and markets it as if it were the original. Some have the audacity to actually mark the knives with the copied logo of the original design ! I believe there would be no such things as collaboration, royalties or liaison at all.
They market the knives at prices that no maker could compete with and the inferior quality gives a poor reputation to all other makers associated with the craft. Those who purchase such knives often have not had the benefit of using a "real" well-crafted knife (factory or custom) and assume that all knives are either that bad or only that good.
Its a bee in my bonnet, this one.
But from your point of view, I think it is not something for you to be concerned about - you have demonstrated integrity and thoughtfullness by actually considering this issue in the first place and THAT is to be admired, my friend.
Cheers. Jason.