Reverse engineering for interoperability is protected with no routes to contest if done with a clean room reimplementation. If you physically own the item and a

Reverse engineering for interoperability is protected with no routes to contest if done with a clean room reimplementation. If you physically own the item and are using it you are even more protected (think fixing your own tractor). Unfortunately I think some lower courts have some messed up decisions or companies are trying to bully others with threats of suit. For example, some medical coding systems have copyrighted codes that are claimed to require a license and you can not install a system to cooperate with these. Except... this has already been decided, and you can.