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DE1807085B1
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One-piece writing tip
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Cartridge filler holder
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Feed device for ballpoint pen
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Filling holder with suction piston
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Filling holder with suction piston
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pen
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Ballpoint pen with storage container for writing fluid
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Filling device for fountain pen with movable piston and a hose bag
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Fountain pen with suction piston and a piston rod consisting of telescopically screwable threaded members
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