Document Type and Number:
Japanese Patent JPS5370228
Kind Code:
U
Application Number:
JP15350476U
Publication Date:
June 13, 1978
Filing Date:
November 15, 1976
Export Citation:
International Classes:
G03B17/12; G02B15/10; (IPC1-7): G02B15/10
Domestic Patent References:
| JPS4737551A |