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. 17, 2008
Filed:
Dec. 19, 2005
James E. Reich, San Francisco, CA (US);
Patrick C. P. Cheung, Castro Valley, CA (US);
Eric J. Shrader, Belmont, CA (US);
Qingfeng Huang, San Jose, CA (US);
James E. Reich, San Francisco, CA (US);
Patrick C. P. Cheung, Castro Valley, CA (US);
Eric J. Shrader, Belmont, CA (US);
Qingfeng Huang, San Jose, CA (US);
Palo Alto Research Center Incorporated, Palo Alto, CA (US);
Abstract
A process for producing a low-visibility retroreflective visual tag, which can be used to identify and/or determine the position of an object. This process involves placing an infra-red-blocking material over a retroreflective substrate to form the low-visibility retroreflective visual tag. This infra-red-blocking material is placed so as to form a pattern, which becomes visible to an infrared sensor when the low-visibility retroreflective visual tag is illuminated by an infra-red light source.