US 7,349,555 B2
Documents and apparatus to encode documents
Geoffrey B. Rhoads, West Linn, Oreg. (US)
Assigned to Digimarc Corporation, Beaverton, Oreg. (US)
Filed on Feb. 26, 2007, as Appl. No. 11/679,004.
Application 11/679004 is a continuation of application No. 11/377708, filed on Mar. 15, 2006, abandoned.
Application 11/377708 is a continuation of application No. 10/656076, filed on Sep. 04, 2003, granted, now 7,016,516.
Application 10/656076 is a continuation of application No. 10/164899, filed on Jun. 04, 2002, granted, now 7,043,052.
Application 10/164899 is a continuation of application No. 09/198022, filed on Nov. 23, 1998, granted, now 6,546,112.
Application 09/198022 is a continuation of application No. 08/763847, filed on Dec. 04, 1996, granted, now 5,841,886.
Application 08/763847 is a continuation of application No. 08/512993, filed on Aug. 09, 1995, abandoned.
Application 08/512993 is a continuation in part of application No. 08/436098, filed on May 08, 1995, granted, now 5,636,292.
Application 08/436098 is a continuation in part of application No. 08/436099, filed on May 08, 1995, granted, now 5,710,834.
Application 08/436099 is a continuation in part of application No. 08/436102, filed on May 08, 1995, granted, now 5,748,783.
Application 08/436102 is a continuation in part of application No. 08/436134, filed on May 08, 1995, granted, now 5,748,763.
Application 08/436134 is a continuation in part of application No. 08/438159, filed on May 08, 1995, granted, now 5,850,481.
Application 08/438159 is a continuation in part of application No. 08/327426, filed on Oct. 21, 1994, granted, now 5,768,426.
Application 08/327426 is a continuation in part of application No. 08/215289, filed on Mar. 17, 1994, abandoned.
Application 08/215289 is a continuation in part of application No. 08/154866, filed on Nov. 18, 1993, abandoned.
Prior Publication US 2007/0217493 A1, Sep. 20, 2007
This patent is subject to a terminal disclaimer.
Int. Cl. H04K 1/00 (2006.01)
U.S. Cl. 382—100  [382/280] 14 Claims
OG exemplary drawing
 
1. Apparatus comprising:
an authenticator which obtains first information corresponding to a document to be constructed into an analog form, the first information also being obtainable from a first portion of the analog form; and
an incorporator which steganographically incorporates the first information in a portion of a digital representation of the document, the first information also being obtainable from a second portion of the analog form, the first information being obtainable with visible light scanning of the second portion of the analog form, the second portion corresponding to the portion of the digital representation.