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The company operated for the first two years under the name of ''United States Steel Pen Manufacturing Company''; in 1858 it become the ''Esterbrook Steel Pen Manufacturing Company''. The company activities were a great success so that at the end of 1900 [[Esterbrook]] was considered, along with ''[[Perry]] & Co.'' (better known later as ''Osmiroid''),  as the largest nib manufacturer of the world. In [[1896]] the company launched itself in the British market.

The company operated for the first two years under the name of ''United States Steel Pen Manufacturing Company''; in 1858 it become the ''Esterbrook Steel Pen Manufacturing Company''. The company activities were a great success so that at the end of 1900 [[Esterbrook]] was considered, along with ''[[Perry]] & Co.'' (better known later as ''Osmiroid''),  as the largest nib manufacturer of the world. In [[1896]] the company launched itself in the British market.

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, called [[Renew-Point]]. In [[1935]] the company introduced the  [[Dollar Pen]] model, called so for its price, just a dollar. A British production, made by [[Conway Stewart]] from the mid-1930s to the 1950s is however known,<ref>according to what is reported at [http://www.esterbrook.net/relief.shtml this page].</ref> for the model called [[Relief]].

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, called [[Renew-Point]]. In [[1935]] the company introduced the  [[Dollar Pen]] model, called so for its price, just a dollar.

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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|1999177}} 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.  

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|1999177}} 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.