Document Type and Number:
Japanese Patent JPS4895231
Kind Code:
A
Application Number:
JP2791172A
Publication Date:
December 06, 1973
Filing Date:
March 17, 1972
Export Citation:
International Classes:
G03B7/083; G03B17/18; (IPC1-7): G03B17/18
Domestic Patent References:
| JPS4510778Y1 | 1970-05-15 | |||
| JPS4745622A |