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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS5240787
Kind Code:
Y1
Application Number:
JP7994170U
Publication Date:
September 14, 1977
Filing Date:
August 11, 1970
Export Citation:
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International Classes:
G04B39/02; G04B37/00; (IPC1-7): G04B37/00
Foreign References:
CH353686A1961-04-15
CH378792A1963-11-30
FR2015698A11970-04-30



 
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