Document Type and Number:
Japanese Patent JPS4810449
Kind Code:
U
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Application Number:
JP5190071U
Publication Date:
February 05, 1973
Filing Date:
June 17, 1971
Export Citation:
International Classes:
G03B17/56; G03B17/50; G03D3/00; G03D13/00; (IPC1-7): G03D13/00; G03B17/50