Document Type and Number:
Japanese Patent JPS4941517
Kind Code:
U
Application Number:
JP8306672U
Publication Date:
April 12, 1974
Filing Date:
July 14, 1972
Export Citation:
International Classes:
G03B31/06; G11B31/00; (IPC1-7): G11B31/00
Domestic Patent References:
| JPS3015650Y1 |