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. 10, 2009
Filed:
Dec. 20, 2005
David Alexander Kahn, Nepean, CA;
John C. B. Davey, Nepean, CA;
David Alexander Kahn, Nepean, CA;
John C. B. Davey, Nepean, CA;
Brytech Inc., Ottawa, CA;
Abstract
A hand-held colorimetric device () suitable for use by blind or color-blind individuals to determine the color of a surface-under-test (SUT), for example of a fabric, has an aperture () which, in use, is covered by the SUT () whose color is to be determined. Six LEDs (A,B,B,A andB) arranged in pairs (A/B,A/B,a/B) emitting red/orange, green, and blue light illuminate the SUT and diffuse reflections therefrom containing red/orange, green, and blue spectrum sample values are used to determine the luminous reflectivity and chromaticity values for the color of the SUT. The measured values are compared with colorimetric values of reference surfaces to determine the color of the SUT. The colorimetric device may output the name of the color aurally.