Document Type and Number:
Japanese Patent JPH0430491
Kind Code:
Y2
Application Number:
JP8197884U
Publication Date:
July 23, 1992
Filing Date:
June 04, 1984
Export Citation:
International Classes:
G09B27/00; G01C1/00; G02B23/16; (IPC1-7): G01C1/00; G02B23/16
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