Document Type and Number:
Japanese Patent JPS5039135
Kind Code:
A
Application Number:
JP8883373A
Publication Date:
April 11, 1975
Filing Date:
August 09, 1973
Export Citation:
International Classes:
G03B31/00; (IPC1-7): G03B31/00
Domestic Patent References:
| JPS337631Y1 | ||||
| JPS4021237Y1 |