Here's my take Bill, as someone who's main joy resides in coming up with new damascus patterns:
I don't tell most people how I make the patterns I really like, just my close friends. I tell them, if it's something I'm trying to hold on-to for myself, not to tell anybody, but I expect them to give credit if they use them. They always have. I encourage others to try and figure out how I made them, and I've only got a couple that I think are unique enough in pattern development that I won't just tell you how I made it.
*However* if someone else figures it out, well, good for them. Hopefully they'll give credit if they saw my pattern and tried to duplicate it.
I myself see other's patterns, and try to figure out how they did it, I'll give credit also, but realistically, if you didn't tell them, and they had to discover it on their own, I'm not sure how much credit is owed, since they had to figure it out the way you did. Some patterns are clever plays on old techniques and can be easy to figure out. Some can be insanely difficult if you're not even sure what pattern development process they're using to start with.
Although I 100% agree that if they've ever seen your pattern, before they duplicated it, they should use the name you came up with. That's the prize you get for being first.
I guess for me it comes down to whether or not they're intentionally duplicating your pattern, or they stumbled across the same pattern.. I'd say that's the only distinction. If they know you did it first, they probably deserve to give you some credit but at some point if a pattern becomes prevalent enough people forget where it came from. Especially when they're variations of a pattern.
Zoe Crist showed me how to make feathers, he told me his feather was shown to/inspired by Kevin Casey. That's as far back as I can give credit, when I do them, but of course, by using the same name, I'm paying homage.
Here's one I came up with last year, I think I may have showed you at Blade: