Isatifikethi sePatent ------Yison ebekwishishini le-audio iminyaka engama-25, uphando oluzimeleyo kunye nophuhliso, uyilo oluzimeleyo, ukuvulwa komngundo ozimeleyo, imveliso ezimeleyo, kwaye wafumana iziqinisekiso zepatent ezingaphezu kwama-50, kwaye wafumana ingxelo eninzi entle evela kubathengi.