[pbhjpbhj]

The UK and USA patent offices, I understand, have procedures to file evidence showing a patent application is not valid - eg because of the 'invention' already being known.

Your comment seems to relate more to unfairness in [lack of] awards of costs in USA legal proceedings.

If you sue me for something I didn't do then it shouldn't cost me anything; that seems reasonable whether the domain is IPR or any other aspect of life.

[graemep]

This varies between countries. AFAIK it is far harder to get the other side to pay your costs if you successfully defend a case in the US than it is in the UK.

[zupa-hu]

Indeed.