申请人 |
PPG INDUSTRIES, INC., PITTSBURGH, PA., US |
发明人 |
SCHWENNINGER, RONALD LEE, RIDGELEY WEST VIRGINIA 26753, US;WELTON, WRIGHT MONTGOMERY, OLDTOWN MARYLAND 21555, US;DAWSON, BOYD STEPHEN, CUMBERLAND MARYLAND 21502, US;MATESA, JOSEPH MICHAEL, PLUM BORO PA. 15239, US;SHELESTAK, LARRY JOHN, BAIRDFORD PA. 15006, US |