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:
Mar. 15, 2016
Filed:
Feb. 17, 2009
Jacob Harel, San Mateo, CA (US);
Jacob Harel, San Mateo, CA (US);
PNF CO., LTD., Belmont, CA (US);
Abstract
A writing implement and system using that writing implement are disclosed. The writing implement includes a pen having an elongated body with a plurality of light sources arranged around an outer surface of the body. Each light source has a unique identity. A pen controller that activates each light source to emit light such that the identity of that source can be ascertained by a detector external to the pen. The number of light sources is greater than or equal to 2, and the light sources are arranged such that at least one of the light sources is visible to a detector external to the pen at any time. The detector can then determine the angle of rotation of the pen relative to a fixed reference direction.