Document Type and Number:
Japanese Patent JPS5051662
Kind Code:
U
Application Number:
JP10482673U
Publication Date:
May 19, 1975
Filing Date:
September 08, 1973
Export Citation:
International Classes:
G03B19/18; G03B31/00; (IPC1-7): G03B31/00
Domestic Patent References:
| JPS4314225Y1 | 1968-06-15 |