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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS5621214
Kind Code:
B2
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Application Number:
JP238975A
Publication Date:
May 18, 1981
Filing Date:
December 25, 1974
Export Citation:
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International Classes:
H01J7/24; H01J23/033; H01J23/08; H01J23/087; H01J25/00; (IPC1-7): H01J23/033



 
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