The decision to declare the patent right invalid has no retrospective effect on the judgments and rulings of patent infringement made and executed by the people's court before the patent right is declared invalid, the decisions on handling patent infringement disputes that have been performed or executed, and the patent licensing and patent transfer contracts that have been performed. However, if the patentee's malice causes losses to others, it shall make compensation. If the patentee or the patentee's transferor fails to return the patent royalty or patent transfer fee to the licensee or the patentee's transferee, which obviously violates the principle of fairness, the patentee or the patentee's transferor shall return all or part of the patent royalty or patent transfer fee to the licensee or the patentee's transferee.