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Priority to JP4250872ApriorityCriticalpatent/JPS492665A/ja
Publication of JPS492665ApublicationCriticalpatent/JPS492665A/ja
B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
B43K—IMPLEMENTS FOR WRITING OR DRAWING
B43K8/00—Pens with writing-points other than nibs or balls
B43K8/02—Pens with writing-points other than nibs or balls with writing-points comprising fibres, felt, or similar porous or capillary material
B43K8/022—Pens with writing-points other than nibs or balls with writing-points comprising fibres, felt, or similar porous or capillary material with writing-points comprising fibres