Document Type and Number:
Japanese Patent JPS51121057
Kind Code:
U
Application Number:
JP3724375U
Publication Date:
October 01, 1976
Filing Date:
March 20, 1975
Export Citation:
International Classes:
G03B19/18; G03B23/02; G03B31/00; G11B5/00; (IPC1-7): G03B31/00; G03B23/02; G11B5/00
Domestic Patent References:
| JPS49131431A | 1974-12-17 |