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The first fountain pen was introduced in 1933<ref>this date is cited [http://www.billspens.com/BillsPens/esterbrook/esterbrook.htm here].</ref> corresponding to the first patent for interchangeable nibs. In 1935 the company introduced the [[Dollar Pen]] model, called so for its price, just a dollar.
The first fountain pen was introduced in 1933<ref>this date is cited [http://www.billspens.com/BillsPens/esterbrook/esterbrook.htm here].</ref> corresponding to the first patent for interchangeable nibs. In 1935 the company introduced the [[Dollar Pen]] model, called so for its price, just a dollar.
The feature that distinguished [[Esterbrook]] production was the interchangeable nib unit,<ref>this feature was protected by the patents {{Cite patent|US|1939753}} and {{Cite patent|US|1939753}} registered respectively in 1933 and 1935, but applied in 1928 and 1933.</ref> but it wasn't the first company offering this feature, that was already used by the [[Personal Point]] nibs made by [[Wahl Eversharp]]. Differently from [[Eversharp]], [[Esterbrook]] used the feature to consent to its clients to easily change their nib as they please, in any moment and not just when buying the pen, helped by the low price of its cheap steel nibs.
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The feature that distinguished [[Esterbrook]] production was the interchangeable nib unit,<ref>this feature was protected by the patents {{Cite patent|US|1939753}} and {{Cite patent|US|1939753}} registered respectively in 1933 and 1935, but applied in 1928 and 1933.</ref> but it wasn't the first company offering this feature, that was already used by the [[Personal Point]] nibs made by [[Wahl Eversharp]]. Differently from [[Eversharp]], [[Esterbrook]] used the feature to consent to its clients to easily change their nib as they please, in any moment and not just when buying the pen, helped by the low price of its cheap steel nibs.
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The most famous model produced by the company is the [[Esterbrook J|J model]], introduced in 1943. (to be completed)
The most famous model produced by the company is the [[Esterbrook J|J model]], introduced in 1943. (to be completed)