Document Type and Number:
Japanese Patent JPS5160247
Kind Code:
U
Application Number:
JP15027875U
Publication Date:
May 12, 1976
Filing Date:
November 06, 1975
Export Citation:
International Classes:
G03B31/00; (IPC1-7): G03B31/00
Domestic Patent References:
| JP44031632A |
Foreign References:
| US3743398A | 1973-07-03 |