Severedthumbs,
I did not as I am not aware that it infringes on any design patents in force. Having a couple of patents myself I take this subject really seriously. I depend on any knife maker I buy from to know where there could be any intellectual property issues before building something.
I think if you want to ask or discuss anything else it will be more productive do it via email or pm. I would be interested in finding out exactly what caused you to bring this up. Thanks.