Document Type and Number:
Japanese Patent JPH0345858
Kind Code:
B2
Inventors:
KAGEYAMA TAKAO
Application Number:
JP23157782A
Publication Date:
July 12, 1991
Filing Date:
December 24, 1982
Export Citation:
Assignee:
NIPPON ELECTRIC CO
International Classes:
G01C19/58; H01J23/10; H01J25/00; H01J25/02
Next Patent: JPH0345859