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US 2022/0030702 A1Published application
Secure embedded watermarks
AssigneeInternational Business Machines Corporation
InventorsMark E. Maresh, Michael J. Whitney, Juan F. Vargas
Life of this patent
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Abstract
An article comprises a superficial watermark located on a first surface. The article also comprises an embedded watermark that is embedded within the article. The embedded watermark may be viewed by an X-ray camera. A method comprises applying a metal-containing mixture to an inner layer of an article, resulting in an embedded watermark within the article. The method also comprises analyzing the properties of metal particles within the mixture. The method also comprises recording the first property.
Claims20
An article comprising:
- a superficial watermark located on a first surface;
- and
- an embedded watermark embedded within the article;
- wherein the embedded watermark may be viewed by an x-ray camera.
1 more element
An article comprising:
- an embedded watermark embedded within the article, wherein the embedded watermark comprises an identifiable mixture of metal particles.
A method comprising:
- applying a metal-containing mixture to an inner layer of an article, resulting in an embedded watermark within the article;
- analyzing a first property of metal particles of the mixture;
- and
- recording the first property.
1 more element
Dependencies are inferred from the claim text.