Document Type and Number:
Japanese Patent JPS53164150
Kind Code:
U
Application Number:
JP6971077U
Publication Date:
December 22, 1978
Filing Date:
May 30, 1977
Export Citation:
International Classes:
G03B21/34; G03B21/36; G03B31/00; (IPC1-7): G03B31/00; G03B21/36
Domestic Patent References:
| JPS5062032A | 1975-05-27 |