Charlie,
I don’t know much about Intellectual Property law. The subject fascinates me, and intellectual property in halacha is something I have always wanted to research, but and my other legal/halachik interests pretty much occupy all my time.
I have come across some of the halachik literature you mentioned. See, e.g., Shut Zichron Yosef, Choshen Mishpat, siman 2, cited in Pischei Teshuva, Choshen Mishpat 2:4 (discussing the famous case of the Zolbach/Amsterdam Brothers edition of shas). It seems to me from the discussion there that even if there is no explicit provision for intellectual property in gemara (though I think it might be tentatively teased from other talmudic discussions related to competition, and the notion that one has a chiyuv to relate ideas in the name of he who initiated them – speculative at best, and I haven’t actually researched it, but there may be something to it), there is significant room for local takanos and halachikly binding legislation on these matters, see generally, Choshen Mishpat, siman 2.