I googled around using the string "chestnut precocious" and the highest referenced link was google books. Which in itself landed on several pages in the midst of the book that discussed the Burbank hybrids and -that these (yours) are indeed selected for precocious bearing. 

I also read upon several chestnut patents. A few clones starting with "AU" in the name are trees of chestnuts granted for farm or wildlife animal feed. 

I think the idea of farming chestnuts around homes sounds great too so Keep going! The interest around Portland should be great as they grow so well here. By reading all the various forms that resulted from what you gained from Burbank ended up with (and now you) were described as some bushy forms and still large fruits. Precocious is a good start but will they taste good too(?). It's just amazing to learn all of what Burbank did when gorilla grafting too save space.

If what your doing is disclosure, which is the first step to a future patent  possibility then maybe it's a good idea to say so but keep your trees' location secret. Then it would also become easy for a patent team to follow your updates of these disclosures, a few times, like maybe a couple per year. The patents are accurately written documents describing how easy to propagate, how stable the invention is after grafting, and on and onto every last detail of the tree shape and fruits. I mean HOS can start a new 3rd subject on "patent work" if the organization wanted to.