Document Type and Number:
Japanese Patent JPS5057437
Kind Code:
U
Application Number:
JP10780773U
Publication Date:
May 29, 1975
Filing Date:
September 14, 1973
Export Citation:
International Classes:
G03B27/02; G03B27/04; (IPC1-7): G03B27/04
Domestic Patent References:
| JPS3925658Y1 |