Document Type and Number:
Japanese Patent JPS53164138
Kind Code:
U
Application Number:
JP6953577U
Publication Date:
December 22, 1978
Filing Date:
May 30, 1977
Export Citation:
International Classes:
G03B17/08; G03B17/00; (IPC1-7): G03B17/00
Domestic Patent References:
| JPS4946684U | 1974-04-24 |