Document Type and Number:
Japanese Patent JPS6449918
Kind Code:
U
Application Number:
JP14473987U
Publication Date:
March 28, 1989
Filing Date:
September 22, 1987
Export Citation:
International Classes:
G02C3/02; (IPC1-7): G02C3/02
Domestic Patent References:
| JP59114802B | ||||
| JP51076444B |
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