[Bakha]

Okay, I'll try to stick specifically to this, then.

Here's how I've seen it handled:

A mastercrafter is allowed to create one masterpiece "recipe" per year. This is an item that is entirely new in the database. It can be made so that only they can craft it, or it can be made so that only they have the recipe. If someone steals the recipe or deconstructs the item and figures out the recipe, then they'd be able to craft it as well.

As for the issue of assigning "proper" names vs. common descriptions to the short descs: the way it's handled is that the person is producing a unique item that no one else can produce. While no one sees that it's "Bakha's Massive Codpiece for the Well-Endowed" they would see, "Wow! That guy has a shiny purple codpiece, and I've never seen one of those before. I wonder where he got it?" Then they find out that it's made by such and such mastercrafter.

I don't know, I'm just not sure that I buy the argument that eventually everyone will recognize Excalibur automatically when they walk into a room.