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ES278935A1
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Improvements improved in tubular deposits extended for a writing instrument (Machine-translation by Google Translate, not legally binding)
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IE25669L
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Marking pen.
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US3138142A
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Writing instrument unit
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US3145412A
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Writing instrument
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GB964518A
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Improvements in or relating to writing instruments and ink cartridges therefor
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GB956578A
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Cartridge pen
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US3179087A
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Writing instrument
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US3012274A
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Apparatus for forming lateral projections on a plastic tube
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US3130712A
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Writing instrument
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US3087463A
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Writing instruments
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US2969030A
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Production of writing tips
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US3095859A
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Writing instrument
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US3196838A
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Writing instrument
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US3008453A
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Writing instruments
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US2972781A
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Method of deforming plastic articles
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US2985296A
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Display device
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GB854313A
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Improvements in or relating to writing instruments
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US2990205A
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Writing instrument coupling
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US2964012A
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Writing instrument
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US3056194A
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Method of assembling a follower film in the cartridge of a ball point pen
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