申请人 |
CANADIAN NATIONAL RAILWAY CO.(CANADIAN NATIONAL), MONTREAL, QUEBEC, CA |
发明人 |
BROCKELSBY, WILLIAM, K., EDMONTON, ALBERTA T5G 0T1, CA;WALKER, CONRAD, M., B., EDMONTON, ALBERTA T6G 1V5, CA;HRYCIUK, MICHAEL, L., EDMONTON, ALBERTA T6J 3P1, CA;GILLIS, DONALD, P., EDMONTON, ALBERTA T6G 0A7, CA |