| brevetti vari ({{FPO Patent|721549}}, {{Cite patent|US|750271}}, {{Cite patent|US|764227}}, {{Cite patent|FR|379615}}, {{Cite patent|GB|190713900}}, {{Cite patent|GB|191129078}}) [http://kamakurapens.invisionzone.com/index.php?showtopic=1812], [http://www.fountainpennetwork.com/forum/index.php?/topic/22944-lang-pen-company-liverpool/] | | brevetti vari ({{FPO Patent|721549}}, {{Cite patent|US|750271}}, {{Cite patent|US|764227}}, {{Cite patent|FR|379615}}, {{Cite patent|GB|190713900}}, {{Cite patent|GB|191129078}}) [http://kamakurapens.invisionzone.com/index.php?showtopic=1812], [http://www.fountainpennetwork.com/forum/index.php?/topic/22944-lang-pen-company-liverpool/] |