Document Type and Number:
Japanese Patent JPS5560105
Kind Code:
U
Application Number:
JP4185678U
Publication Date:
April 24, 1980
Filing Date:
March 31, 1978
Export Citation:
International Classes:
G02B23/18; (IPC1-7): G02B23/18
Domestic Patent References:
| JPS3911542Y1 |