Document Type and Number:
Japanese Patent JPS5423735
Kind Code:
U
Application Number:
JP9579977U
Publication Date:
February 16, 1979
Filing Date:
July 20, 1977
Export Citation:
International Classes:
G02B6/00; H01P3/00; (IPC1-7): G02B5/14; H01P3/00
Domestic Patent References:
| JP50114339B | ||||
| JPS4713291A | 1972-07-06 |