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:
Oct. 08, 2013
Filed:
May. 25, 2010
Webb T. Nelson, Woodinville, WA (US);
Mark J. Chernick, Woodinville, WA (US);
Webb T. Nelson, Woodinville, WA (US);
Mark J. Chernick, Woodinville, WA (US);
Other;
Abstract
A system and method of illuminating a portable object even when the object is otherwise well illuminated by ambient light. Retroreflective material is provided on the exterior of the portable object. The retroreflective material may be pigmented to absorb most light and reflects only light within a predetermined frequency range. An illumination assembly is provided that contains a first light source and a second light source. The first light source and the second light source are positioned a short distance apart so that they produce stereoscopic beams of light. Each of the stereoscopic beams of light is monochromatic. Furthermore, the frequency of each of the stereoscopic beams of light falls within the predetermined frequency range. When the stereoscopic beams of light strike the retroreflective material, it shines even in bright ambient light.