Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Ceylon H. Rentz0
Date of Patent
June 24, 2008
0Patent Application Number
116221550
Date Filed
January 11, 2007
0Patent Primary Examiner
Patent abstract
A writing instrument comprising a smooth elongate case has a recessed switch for extending and retracting the tip of an ink cartridge. This allows the tip to be extended and retracted with one hand, while at the same time preventing the switch from being snagged by the contents or threads inside a pocket. A second embodiment provides two cartridges and a three-way switch, allowing one tip to be extended at one end of the instrument while the other end remains within the case. A third embodiment utilizes a single cartridge with two writing tips, one at either end.
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