Document Type and Number:
Japanese Patent JPH0530255
Kind Code:
B2
Inventors:
ISHIGURO YASUO
Application Number:
JP24630083A
Publication Date:
May 07, 1993
Filing Date:
December 31, 1983
Export Citation:
Assignee:
COPAL CO LTD
International Classes:
G03B9/08; G03B9/10