T 0256/19 (Own-voice signal processing/SONOVA) of 04.05.2021KeywordsNovelty - main request (no)Amendment occasioned by ground for opposition - auxiliary request 1 (no)Inventive step - auxiliary requests 2, 3, 5 to 7, 7a (no)Clarity - auxiliary request 4' (no)Date of decision04.05.2021Decision in EN