Hi DJ_Wolf,
No I hadn't seen the video. I've not studied Ernie's patent so I cannot fairly comment.
As mentioned by Esav, the "wave" function is not exclusive to to Ernie's invention. We used to modify our knives to do that in the 50's using a variety of methods. Ernie's design and patent must have specific requirements and limitations. A "clothing" or "pocket hook" on the rear spine is only one way.
It sounds like Cold Steel's video is taking advantage of their own design to sell Ernie's feature. I personally saw a knife in the 80's that had a "wave" or "clothing hook" cut into the blade towards the front close to the tip. The inventor said he had patented the idea for one hand opening. You would really have to study Ernie's patent to determine if the Cold Steel "sell" was an infringement, loophole or whatever?
For example, the "function" of opening a knife with one hand can be accomplished many ways; thumb studs, thumb discs, lobes (as used on the Solo line), holes, autos, semi autos, dents, rough spots, Cobra Hoods, Bram's Kinetic probe, etc.
Our original patent did not defend against other methods of achieving the same "funtion".
That said, I am not grandstanding for Cold Steel. I can say that personally, Spyderco has not had IP disputes that were not resolved amicably. We've not had to pay attorney's to speak with them.
As for "Honor", that is another story and I can only speak for Spyderco. I can plead ignorance for Spyderco when we infringed on Imperial-Schrade's name "Pro-Hunter". They told us, we changed.
When we create a design concept, our first question is "who is currently doing that?" If anyone is doing it, we will generally drop it or try to get very far away from it. eg: Our butterfly model was very carefully designed to be very different from existing models made by other companies. If we could not have created a "new" design, we would not have entered the market. I would have to say that is more "industry cooperation or "honor" if yo will. It may or may not include IP.
There are very few companies in the knife Industry that I would stand up and say "they are, in my personal opinion and experience, completely honorable".
Honor is different than IP. Cold Steel's claims that AUS-8 will outperform any other steel is pure BS, IMO (unless peformance by definition includes costs and profits). We would never consider making a Randall copy without Gary's permission. But I do not think that Spyderco's, Cold Steel's or Benchmade's honor is in question here.
I believe Thom's question was more a case of, "Isn't it interesting to observe how our emotions tend to influence our reason when discussing Spyderco's IP comparing Cold Steel's and Benchmade's possible infringment". (please forgive me Thom for my explanation).
The discussion of "honor" is a very heavy subject and would probably be best discussed in another thread.
sal