| brevetta il cappuccio di sicurezza denominato ''"[[Jack Knife]]"'' ({{Cite patent|US|1028382}}) ed introduce i modelli [[Jack Knife Safety Pen]]!!!!secondo quanto indicato in [http://parkercollector.com/luckycurve.html#jackknife questa pagina].!!
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| brevetta il cappuccio di sicurezza denominato ''"[[Jack Knife]]"'' ({{Cite patent|US|1028382}}) ed introduce i modelli [[Jack Knife Safety]]!!!!secondo quanto indicato in [http://parkercollector.com/luckycurve.html#jackknife questa pagina].!!
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|patent the ''"[[Jack Knife]]"'' cap and introduces the [[Jack Knife Safety Pen]]!!!!according to what is said in [http://parkercollector.com/luckycurve.html#jackknife this page].!!
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|patent the ''"[[Jack Knife]]"'' cap and introduces the [[Jack Knife Safety]]!!!!according to what is said in [http://parkercollector.com/luckycurve.html#jackknife this page].!!
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|a breveté le capouchon ''"[[Jack Knife]]"'' et a introduit les modeles [[Jack Knife Safety Pen]]!!!!selon ce qui est reporté dans [http://parkercollector.com/luckycurve.html#jackknife cette page].!!
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|a breveté le capouchon ''"[[Jack Knife]]"'' et a introduit les modeles [[Jack Knife Safety]]!!!!selon ce qui est reporté dans [http://parkercollector.com/luckycurve.html#jackknife cette page].!!