Document Type and Number:
Japanese Patent JPS5242637
Kind Code:
U
Application Number:
JP12892775U
Publication Date:
March 26, 1977
Filing Date:
September 22, 1975
Export Citation:
International Classes:
G02B7/105; G02B7/04; (IPC1-7): G02B7/04
Domestic Patent References:
| JPS4917540A | 1974-02-16 |