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...egan to sell inks produced by other under its own brand. Then he took some patents and started also his own production; the activity had a great success, so m ...en Company]], according to others their pens were made by the [[De Witt-La France]], a fountain pen manufacturer whose facilities were close to those of [[Ca

...]], derived from a patent ({{Cite patent|US|1209978}}) of the [[De Witt-La France]], which has a sort of "leash" attached to the lever that prevents it from ==Related Patents==