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Patent Searching and Data

Document Type and Number:
Japanese Patent JPS5535894
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Publication Date:
September 17, 1980
Filing Date:
December 28, 1972
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International Classes:
H03K5/04; H01H47/18; H03K5/13; H03K17/28; H03K17/296; (IPC1-7): H03K17/28; H03K5/13

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