Document Type and Number:
Japanese Patent JPS50134426
Kind Code:
A
Application Number:
JP3703675A
Publication Date:
October 24, 1975
Filing Date:
March 28, 1975
Export Citation:
International Classes:
G03B19/18; G03B19/24; G03B31/00; G03B31/02; (IPC1-7): G03B15/00; G03B31/02
Domestic Patent References:
| JPS4328380Y1 | 1968-11-22 | |||
| JP42016582A |