Document Type and Number:
Japanese Patent JPH02111108
Kind Code:
U
Application Number:
JP1995189U
Publication Date:
September 05, 1990
Filing Date:
February 21, 1989
Export Citation:
International Classes:
G02B6/36; (IPC1-7): G02B6/36
Domestic Patent References:
JPS5683711A | 1981-07-08 | |||
JPS5767906A | 1982-04-24 | |||
JP55065605B | ||||
JP61157908B |