Document Type and Number:
Japanese Patent JPS5231200
Kind Code:
U
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Application Number:
JP11744075U
Publication Date:
March 04, 1977
Filing Date:
August 26, 1975
Export Citation:
International Classes:
G02C3/00; A63B33/00; G02C5/00; G02C5/14; (IPC1-7): A63B33/00; G02C5/14