Document Type and Number:
Japanese Patent JPH0390217
Kind Code:
U
Application Number:
JP15218689U
Publication Date:
September 13, 1991
Filing Date:
December 28, 1989
Export Citation:
International Classes:
G02C5/22; (IPC1-7): G02C5/22
Domestic Patent References:
| JP54055354B | ||||
| JP63194320B | ||||
| JP62110920B |
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