申请人 |
APEX CONSTRUCTION SYSTEMS, INC.;DAVIES, FRANKLIN, DAVID;DOBROATA, LAURIAN;HEIJDEN, RUDOLF, ALFRED;KAY, RICHARD, WILLIAM;NIPPERT, ROBERT, H. |
发明人 |
DAVIES, FRANKLIN, DAVID;DOBROATA, LAURIAN;HEIJDEN, RUDOLF, ALFRED;KAY, RICHARD, WILLIAM;NIPPERT, ROBERT, H. |