Document Type and Number:
Japanese Patent JPS53105743
Kind Code:
U
Application Number:
JP943677U
Publication Date:
August 25, 1978
Filing Date:
January 31, 1977
Export Citation:
International Classes:
G03B19/18; G03B1/32; G03B31/00; (IPC1-7): G03B31/00; G03B1/32
Domestic Patent References:
| JPS49131447A | 1974-12-17 |