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...as in the adjacent figure. The custom of having an imprint was practically universal until the '20s and on hard rubber models, to disappear gradually on models ...l, the country of production, any logos used by the company, references to patents used for the pen, etc. In addition to the illustrated case of longitudinal

...the nib itself (fine, medium, wide, etc..). Even in this case, there is no universal standardization adopted by all, even if many manufacturers have ended up us ==Related Patents===