Unisound Patents

Patent portfolio assigned to Unisound (verified via public assignee records). Beijing AI voice/speech firm (Yunzhisheng). Competitors iFLYTEK/Baidu per Wikipedia; AISpeech as a named China speech-recognition peer. Baidu and IngDan named as partners/collaborators (chip development), not paying end customers. Patents confirmed: multiple Google Patents records assigned to 'Unisound Intelligent Technology Co Ltd' / 'Beijing Yunzhisheng Information Technology Co Ltd' (speech recognition/synthesis); count not captured (assignee UI returned HTTP 503).