Document Type and Number:
Japanese Patent JPS5114261
Kind Code:
B1
Application Number:
JP9366270A
Publication Date:
May 08, 1976
Filing Date:
October 24, 1970
Export Citation:
International Classes:
G03B21/11; (IPC1-7): G03B21/11
Domestic Patent References:
| JP42023900A |
Foreign References:
| US2895739A | 1959-07-21 |