Document Type and Number:
Japanese Patent JPS5116722
Kind Code:
Y1
Application Number:
JP9902168U
Publication Date:
May 07, 1976
Filing Date:
November 13, 1968
Export Citation:
International Classes:
G03B31/04; G11B15/02; G11B15/10; G11B31/00; (IPC1-7): G11B31/00; G11B1/00; G11B15/02
Domestic Patent References:
| JP36015225A |
Foreign References:
| GB767439A | 1957-02-06 |