(19)
(11)
EP 0 267 220 A1
(12)
(43)
Date of publication:
18.05.1988
Bulletin 1988/20
(21)
Application number:
87902652.0
(22)
Date of filing:
08.05.1987
(51)
International Patent Classification (IPC):
H04M
1/
02
( . )
(86)
International application number:
PCT/GB1987/000305
(87)
International publication number:
WO 1987/007103
(
19.11.1987
Gazette 1987/25)
(84)
Designated Contracting States:
AT BE CH DE FR IT LI LU NL SE
(30)
Priority:
09.05.1986
GB 19860011348
(71)
Applicant:
PLESSEY OVERSEAS LIMITED
Ilford Essex IG1 4AQ (GB)
(72)
Inventors:
STEER, David
Bracebridge Lincoln LN5 8QX (GB)
COLEBOURNE, Leonard
Porchester Road Nottingham NG3 6LR (GB)
HAWKER, Steven
Arnold Nottingham NG9 8DR (GB)
(54)
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