Document Type and Number:
Japanese Patent JPS5284836
Kind Code:
U
Application Number:
JP17234075U
Publication Date:
June 24, 1977
Filing Date:
December 20, 1975
Export Citation:
International Classes:
G03B31/00; (IPC1-7): G03B31/00
Domestic Patent References:
| JPS5124941B1 | 1976-07-28 |