Document Type and Number:
Japanese Patent JPS4998627
Kind Code:
A
Application Number:
JP453074A
Publication Date:
September 18, 1974
Filing Date:
December 27, 1973
Export Citation:
International Classes:
G03B31/00; G03B31/02; G11B15/34; (IPC1-7): G03B31/04
Domestic Patent References:
| JPS474472A |