Currently, none. As expensive as the patent system may be, the largest companies who deal with it are still in a position to treat it like a basic cost of doin

Currently, none. As expensive as the patent system may be, the largest companies who deal with it are still in a position to treat it like a basic cost of doing business; one that happens to be so high that it can protect them from the truly disruptive innovations that are unlikely to come from their peers in the field. As long as elections are privately financed cartels that depend on trolls to scare off potentially competitive startups, the patent system is going to stay broken. If and when we manage to reduce lobbyists to mere lobbyists, and not lobbyist/financiers, then sanity may prevail.