Citada por|
| US4272206 | 30 Oct 1978 | 9 Jun 1981 | | Safety ink pen | | US4551035 | 6 Dic 1983 | 5 Nov 1985 | The Gillette Company | Marking instrument | | US6224282 | 27 Dic 1999 | 1 May 2001 | Kotobuki & Co., Ltd. | Side knock-type ball point pen | | US6745474 | 17 Dic 2002 | 8 Jun 2004 | | Blade pushing device of cutting knives | | US6752557 | 23 Oct 2003 | 22 Jun 2004 | | Retractile pen | | US6755584 | 24 Ene 2002 | 29 Jun 2004 | BIC Corporation | Writing instrument | | US8011867 | 25 Mar 2008 | 6 Sep 2011 | Dell Products, LP | Flush captive screw with retractable knurled knob | | USD535693 | 16 Mar 2005 | 23 Ene 2007 | Sanford GmbH | Writing instrument |
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