| 申请人 |
ARMSTRONG WORLD INDUSTRIES, INC., LANCASTER, PA., US |
发明人 |
DAVEY, RAYMOND GRAHAM, LANCASTER, PA., US;HINES, CHARLES HENRY, COLUMBIA, PA., US;KO, KENNETH KOON-YING, WEST GROVE, PA., US;LEWICKI JUN., WALTER JOHN, LANCASTER, PA., US;PUTT, DEAN LEO, LITITZ, PA., US |
