(19)
(11)
EP 0 054 558 A1
(12)
(43)
Date of publication:
30.06.1982
Bulletin 1982/26
(21)
Application number:
81901692.0
(22)
Date of filing:
19.06.1981
(51)
International Patent Classification (IPC):
G01R
13/
00
( . )
G02F
1/
1343
( . )
G09G
3/
36
( . )
G01R
13/
40
( . )
G09G
3/
20
( . )
(86)
International application number:
PCT/GB1981/000105
(87)
International publication number:
WO 1982/000206
(
21.01.1982
Gazette 1982/03)
(84)
Designated Contracting States:
CH DE FR LI NL
(30)
Priority:
27.06.1980
GB 19800021073
(71)
Applicant:
NATIONAL RESEARCH DEVELOPMENT CORPORATION
London SE1 6BU (GB)
(72)
Inventor:
SHANKS, Ian Alexander
Malvern Worcestershire (GB)
(74)
Representative:
Gunning, William John
Procurement Executive, Ministry of Defence Patents 1A(4), Room 1932 Empress State Building Lillie Road
London SW6 1TR
London SW6 1TR (GB)
(54)
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