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:
Jun. 09, 2009
Filed:
Apr. 30, 2007
Brad E. Koerner, Boston, MA (US);
Kevin J. Dowling, Westford, MA (US);
Brad E. Koerner, Boston, MA (US);
Kevin J. Dowling, Westford, MA (US);
Philips Solid-State Lighting Solutions, Inc., Burlington, MA (US);
Abstract
Disclosed herein are methods and apparatus for providing a luminous writing surface, whose color, color temperature, and/or brightness are controlled to achieve a desired contrast between the writing surface and markings removably made thereon. For example, LED-based light sources and/or LED-based controllable lighting units can be employed to back-light or edge-light a transparent or translucent material thereby providing the luminous writing surface.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile