Document Type and Number:
Japanese Patent JPS5212538
Kind Code:
U
Application Number:
JP9807375U
Publication Date:
January 28, 1977
Filing Date:
July 15, 1975
Export Citation:
International Classes:
G03B23/02; G11B23/00; G11B23/44; (IPC1-7): G03B23/02; G11B23/00
Domestic Patent References:
| JPS4936941B1 | 1974-10-04 |