| US 7,533,022 B2 | ||
| Printed media with machine readable markings | ||
| Kia Silverbrook, Balmain (Australia); Paul Lapstun, Balmain (Australia); and Simon Robert Walmsley, Balmain (Australia) | ||
| Assigned to Silverbrook Research Pty Ltd, Balmain, New South Wales (Australia) | ||
| Filed on Nov. 08, 2004, as Appl. No. 10/982,834. | ||
| Application 10/982834 is a continuation of application No. 10/636220, filed on Aug. 08, 2003, granted, now 7,155,394. | ||
| Application 10/636220 is a continuation of application No. 09/690078, filed on Oct. 20, 2000, granted, now 6,647,369. | ||
| Prior Publication US 2005/0062281 A1, Mar. 24, 2005 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. G10L 19/00 (2006.01) | ||
| U.S. Cl. 704—270 [704/500] | 10 Claims |
| 1. A printed media comprising:
a photographic medium;
a visible light ink printed on said medium, the visible light ink representing an image for viewing by a human; and
infra-red ink printed over said visible light ink, said infra-red defining a machine readable array of markings invisible
to the human eye, the markings encoding data.
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