Document Type and Number:
Japanese Patent JPS49105512
Kind Code:
A
Application Number:
JP1588473A
Publication Date:
October 05, 1974
Filing Date:
February 08, 1973
Export Citation:
International Classes:
G03B31/06; G11B3/00; G11B15/02
Domestic Patent References:
| JPS4327404Y1 | 1968-11-13 |