Document Type and Number:
Japanese Patent JPS5118825
Kind Code:
B1
Application Number:
JP9105169A
Publication Date:
June 12, 1976
Filing Date:
November 12, 1969
Export Citation:
International Classes:
G03B31/06; G03B31/00; (IPC1-7): G03B31/00
Domestic Patent References:
| JPS412048Y1 |