The problem is that hole just isn't a hole. How does the hole differ from a Spyderco bug or Benchmade butterfly?
I would be highly interested in reading any documentation that you can present/link that supports this claim. I wasn't aware that the trademark registration process looked into what other competitors thought of the trademark application.
I should have qualified that by saying "IIRC". My fault on that one. There was a post where Sal Glesser explained some about what they had to go through to get the trademark approved. I'm not sure if that's where I read it or not. It could well have been something I just read on the forums. I do believe that they actually have to demonstrate that there is some sort of brand recognition, but can't say for sure all the details. Again, I should have qualified it with "IIRC". Sorry. If I manage to come across it again, then I'll try to remember to get it to you. (I found the post I was thinking of, and while it is quite informative, it makes no mention of other companies making such a claim). It does explain briefly the process that Spyderco had to go through to get the trademark.
However, that doesn't change the fact that BM should still at least credit Spyderco with the Spyderhole. That would be "doing the right thing". It's just like using some else’s research in writing a paper, book, or article. I think it's safe to say that most people involved in the cutlery industry understand that using a round hole thumb opener was an idea that Sal Glesser pioneered, just like the mid lock is associated with Al Mar, and the frame lock is associated with Chris Reeve, and the liner lock is associated with Michael Walker. What’s so hard about "giving credit where credit is due"?
As for the trademark ability of the Spyderhole, well, there is probably a lot of legal requirements for such things that are currently beyond my understanding. Personally, I see it as something that is exclusive to Spyderco and their licensee’s. I believe that the round, thumb opening hole is associated with Spyderco, and I can’t believe anyone would think differently unless they were either out of touch with the cutlery industry, or just plain dishonest. I say this because; Spyderco had a patent on it, and then the trademark. For the most part, it has been an exclusive, Spyderco item. Didn’t Benchmade even credit Spyderco with the Spyderhole when they produced the AFCK? At the very least they did get a license from Spyderco, so they have to know that it is Sal Glesser’s IP.
I can understand that Benchmade may be doing this just so they can attack the Trademark (even though I don’t agree with it), but why can’t they just come up with something better. Maybe if they’d spend more time working on their own innovation instead of working on using someone else’s, they would actually come up with something better. Maybe they could have come up with a comet (some people have actually said that they prefer that to the Spyderhole. Is Benchmade going to rip of the comet next?