The question asked was "What non-lethal technology out there has the best potential to be more effective at immobilizing a target and/or protecting a cop than a gun?"
As stated, the answer is nothing.
While less-lethal devices certainly have their place, ultimately a police officer needs to be able to use deadly force to protect himself and others.
Any provision of U.S. law that eliminated “pre-established damage” or “additional damages” for any class of works could be a violation of various TPP provisions requiring that such damages be made available, and it even appears that distribution of orphan works would have to subject the distributor to criminal copyright liability.
In 1750 Issac Newton became discouraged when he fell up a flight of stairs.