Computing new certificate for digitized version of a physical document
US9854125B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Jan 30, 2012 |
| Grant date | Dec 26, 2017 |
| Priority date | — |
| Expiry date | Jul 21, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/3236
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In one implementation, a physical version of a document is converted to a digital representation of the physical version and a new certificate is computed for the digital representation of the physical version. The new certificate is computed based on the digital representation of the physical version, at least one processing step performed on the digital representation, and a prior certificate computed for a prior digital representation indicative of the physical version. In another implementation, a document is validated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.