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Priority to JP1987063989UpriorityCriticalpatent/JPH0632068Y2/ja
Priority to US07/188,011prioritypatent/US4878444A/en
Publication of JPS63171152UpublicationCriticalpatent/JPS63171152U/ja
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Publication of JPH0632068Y2publicationCriticalpatent/JPH0632068Y2/ja
Electronic sewing machine and presser foot particularly for buttonhole stitches and process for producing buttonhole stitches utilizing alternately operable sensor
