Patch

A patch (otherwise known as a new client version) is a modification to the game files of League of Legends. Every patch will contain one or more of the following materials:
 * New game content: new or remade champions, items, and skins.
 * Balance changes: changes made to even out the power balance between champions.
 * Bug fixes: changes made to correct unintended behaviour in the game.
 * League of Legends and PVP.net features: Anything new that you will experience on PVP.net or in the game.
 * Backend/development changes: technology or configuration changes that go on behind the scenes.
 * Patch Notes: Riot Games' official documentation of the changes made.

Below is a table summarizing the notable events, North American release date, Patch Notes link and, where applicable, the newly introduced champion of each patch.

List of Patches
Parche Patch Notes 补丁