The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 14, 2004
Filed:
Apr. 06, 2004
Go Simon Sunatori, Gatineau, QC, CA;
Other;
Abstract
A retractable pen comprises a pen and a cap. The pen comprises a hollow case, an ink cartridge, a mechanical spring and a mobile magnetic element. The cap comprises a cap body and a stationary permanent magnet. The pen is capable of attaching to the cap by the magnetic attraction force in a single-hand operation when a user places the mobile magnetic element of the pen in proximity to the stationary permanent magnet of the cap. The writing tip of the ink cartridge of the pen retracts into the hollow case of the pen when an upward magnetic attraction force is greater than a downward mechanical expansion force. This invention relates to pens, and the principal use of the invention is for operating a pen with a single hand.