Security document with steganographically-encoded authentication data

United States of America Patent

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Apr 8, 2003
Issued Date
N/A
app pub date
Nov 23, 1998
filing date
Nov 18, 1993

priority date (Note)
Expired

status (Latency Note)

Importance

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Abstract

Security of a document is enhanced by steganographically embedding, within a graphic on the document, data that can be used in conjunction with text on the document to authenticate the document.

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First Claim

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Patent Owner(s)

Patent Owner	Address
DIGIMARC CORPORATION (AN OREGON CORPORATION)	9405 SW GEMINI DRIVE BEAVERTON OR 97008

International Classification(s)

H04K:SECRET COMMUNICATION; JAMMING OF COMMUNICATION

[Classification Symbol]

[Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Rhoads, Geoffrey B	West Linn, OR	697	78610

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Security document with steganographically-encoded authentication data

Number of patents in Portfolio can not be more than 2000

United States of America Patent

09198022

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Importance

Abstract

First Claim

Family

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US Family Size	Non-US Coverage
Patent Longevity Expired	Forward Citations

PATENT NO	6546112
SERIAL NO	09198022
DOCKET NO

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09198022

Stats

Importance

Abstract

First Claim

Family

Patent Owner(s)

International Classification(s)

Inventor(s)

Cited Art Landscape

Patent Citation Ranking

Forward Cite Landscape

Maintenance Fees

Full Text

Legal Events

Matter Detail

Renewals Detail

Load PAIR data

Payment Failure

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Update PAIR data

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File History PDF

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Important Note on Priority Date data