Document Type and Number:
Japanese Patent JPH02111122
Kind Code:
U
Application Number:
JP1955989U
Publication Date:
September 05, 1990
Filing Date:
February 23, 1989
Export Citation:
International Classes:
G03B13/02; G02B7/02; (IPC1-7): G03B13/02; G02B7/02
Domestic Patent References:
| JPS63152365U | 1988-10-06 |