Document Type and Number:
Japanese Patent JPS5053045
Kind Code:
A
Application Number:
JP8212373A
Publication Date:
May 10, 1975
Filing Date:
July 18, 1973
Export Citation:
International Classes:
G03B31/00; G03B31/02; (IPC1-7): G03B31/02
Domestic Patent References:
| JP46003575U |
Foreign References:
| US3514194A | 1970-05-26 |