I searched and found someone linked this in another thread. http://www.trademarkia.com/logo-76172212.html
It seems like it is being used as a trademark of the company and would act just like the name Busse Knife Co. does. If thats true then I don't see why someone cannot just make a different shape or larger hole and say "This is a design feature. The intended use is securing the knife to ones hand during combat." Or something to that effect.
I don't see how he could claim trademark infringement on that feature unless you intentionally put it there to mimic his trademark and fool the buyers into thinking your knife is a Busse.
Just my 2cents
It seems like it is being used as a trademark of the company and would act just like the name Busse Knife Co. does. If thats true then I don't see why someone cannot just make a different shape or larger hole and say "This is a design feature. The intended use is securing the knife to ones hand during combat." Or something to that effect.
I don't see how he could claim trademark infringement on that feature unless you intentionally put it there to mimic his trademark and fool the buyers into thinking your knife is a Busse.
Just my 2cents