In the Rosinante trilogy of Alexis A. Gilliland the autonomous AIs are self-owned corporations, and indeed are sometimes addressed with the word "Corporate" as

In the Rosinante trilogy of Alexis A. Gilliland the autonomous AIs are self-owned corporations, and indeed are sometimes addressed with the word "Corporate" as a title, somewhat like "Mr" or "Ms". This is of course fiction; while much of the engineering in the series seems plausible I have no idea if the legal theories are. Worth reading anyway, the AIs are charming.