Document Type and Number:
Japanese Patent JPS5068137
Kind Code:
A
Application Number:
JP11638673A
Publication Date:
June 07, 1975
Filing Date:
October 18, 1973
Export Citation:
International Classes:
G03B31/00; (IPC1-7): G03B31/00
Foreign References:
| US3197574A | 1965-07-27 |