So my question is, if an individual is wanting to tie some flies and sell a few to offset the cost of materials, is there anything governing the use of other peoples patterns? Ie. if you find a pattern on the internet that appears to be invented by someone, can you tie it yourself and sell it? Some that come to mind would be Bully's Bluegill Spider, STP Frog, GFA Hopper, Double Bunny, etc? These don't seem to be as generic of a fly as an adams, pheasant tail nymph, etc. Or is it just an ethics question?

Thanks