Document Type and Number:
Japanese Patent JPS4955331
Kind Code:
A
Application Number:
JP4495173A
Publication Date:
May 29, 1974
Filing Date:
April 20, 1973
Export Citation:
International Classes:
G03B19/18; G03B21/43; G03B21/50; G03B31/02; (IPC1-7): G03B17/24
Domestic Patent References:
| JPS4029202Y1 | ||||
| JP41000260A |