Why do you feel the need to register your fly pattern?? Are you looking for a monetary gain with these patterns??

Alot of famous fly tyers have never 'registered' their fly patterns and have graciously shared them with the fly fishing/tying community.

Patenting your fly pattern can be expensive. Extensive research must be made as to not infringe on other patents or even copyrighted flies.

Does this fly do things that no other fly does to catch fish!

Most 'new' flies are simply a variation of older patterns with new material.

Just my opinion.