Document Type and Number:
Japanese Patent JPS5051663
Kind Code:
U
Application Number:
JP9316973U
Publication Date:
May 19, 1975
Filing Date:
August 09, 1973
Export Citation:
International Classes:
G03B19/18; G03B17/00; G03B31/00; (IPC1-7): G03B31/00; G03B17/00
Domestic Patent References:
| JPS49131439A | 1974-12-17 |