申请人 |
DE BEERS INDUSTRIAL DIAMOND DIVISION (PROPRIETARY) LTD., JOHANNESBURG, TRANSVAAL, ZA |
发明人 |
WORT, CHRISTOPHER JOHN HOWARD, WANTAGE, OXEN OX12 7DG, GB;SUSSMANN, RICARDO SIMON, GUILDFORD, SURREY GU1 2NT, GB;HOLLIDAY, HARRY RICHARD, LEOMINSTER HEREFORDSHIRE, GB;HAWKINS, DENNIS CHARLES, LEOMINSTER HEREFORDSHIRE, GB |