As a plaintiff, patent infringement lawsuit is a very useful tool to fight against potential infringers and preserve patent owner's market. Before bringing a lawsuit into a court, a list of things should be considered, including which court to select, what evidences to prepare, back-up plans, and etc.

As a defendant in a lawsuit, before attending to a court, many actions need to be taken, for example, possible invalidation procedures, non-infringement confirmation suit, claim construction and comparison, settlement plans, and etc.