Document Type and Number:
Japanese Patent JPS50134607
Kind Code:
A
Application Number:
JP4122474A
Publication Date:
October 24, 1975
Filing Date:
April 10, 1974
Export Citation:
International Classes:
G03C1/00; G03B31/00; G03B31/06; G11B23/44; G11B31/00; (IPC1-7): G03B31/00; G11B31/00
Domestic Patent References:
| JPS477073U | 1972-09-26 | |||
| JP38002079A | ||||
| JP35007861A | ||||
| JP35031253A | ||||
| JPS362360Y1 |
Foreign References:
| US2670212A | 1954-02-23 |