Case T-503/20: Judgment of the General Court of 22 September 2021 — T i D kontrolni sistemi v EUIPO –Sigmatron (Signalling apparatuses and devices) (Community design — Invalidity proceedings — Registered Community design representing signalling apparatuses and devices — Earlier Community design — Ground for invalidity — No individual character — Declaration of invalidity of a prior design — No effect — Disclosure of the earlier design — Informed user — Degree of freedom of the designer — No different overall impression — Article 6 and Article 25(1)(b) of Regulation (EC) No 6/2002)