Document Type and Number:
Japanese Patent JPS5421545
Kind Code:
U
Application Number:
JP9391177U
Publication Date:
February 13, 1979
Filing Date:
July 13, 1977
Export Citation:
International Classes:
G02B3/08; G03B21/62; G03B21/625; (IPC1-7): G03B21/60
Domestic Patent References:
| JPS488240A | ||||
| JPS4745727A |