| 申请人 |
PPG INDUSTRIES, INC., PITTSBURGH, PA., US |
发明人 |
BLACKBURN, WILLIAM PELHAM, EVANS CITY, PA. 16033, US;AMBROSE, RONALD RUTHVOYNE, ALLISON PARK, PA. 15101, US;PORTER, SAMUEL, JR., NATRONA HEIGHTS, PA. 15065, US;BURKHOLDER, MARY JO, MARS, PA. 16046, US |
