申请人 |
THE BRITISH PETROLEUM CO. P.L.C., LONDON, GB |
发明人 |
ATKINS, MARTIN PHILIP, SUNBURY-ON-THAMES MIDDLESEX TW16 7LN, GB;WILLIAMS, JOHN, GWYNEDD LL65 1AL NORTH WALES, GB;BALLANTINE, JAMES ARCHIBALD, WEST CROSS SWANSEA SA3 5QL, GB;PURNELL, JOHN HOWARD, GOWER SWANSEA, GB |