Case T-515/19: Judgment of the General Court of 24 March 2021 — Lego v EUIPO — Delta Sport Handelskontor (Building block from a toy building set) (Community design — Invalidity proceedings — Registered community design representing a building block from a toy building set — Ground for invalidity — Non-compliance with requirements for protection — Article 25(1)(b) of Regulation (EC) No 6/2002 — Features of appearance of a product solely dictated by its technical function — Features of appearance of a product to be necessarily reproduced in their exact form and dimensions in order to permit the interconnection with other products — Designs whose purpose is to allow multiple assembly or connection of mutually interchangeable products within a modular system — Article 8(1) to (3) of Regulation No 6/2002)