Device for encoding and marking of documents for...

Image analysis – Applications

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C382S306000, C358S003280

Reexamination Certificate

active

07599513

ABSTRACT:
A device which collects the pixel information generated during printing or scanning of a document, and transforms this sequential information into a code A which has a one-to-one relationship to the sequential pixel information, and which device computes from this code A a hashcode H which meets the requirements of a digital signature, and which device then feeds the digital information needed to print the hashcode H to the printer, in a pixel format, or feeds the same hashcode H to the digital media storage device, in both cases in a part of the document page which is digitally stored or printed, a method of use of the said device in encoding a document to form a hashcode H in pixel form.

REFERENCES:
patent: 5467447 (1995-11-01), Vogel
patent: 6369904 (2002-04-01), Bhattacharjya et al.
patent: 6952485 (2005-10-01), Davidson et al.
patent: 6970573 (2005-11-01), Carr et al.
patent: 7246239 (2007-07-01), Rodriguez et al.
patent: 2002/0054356 (2002-05-01), Kurita et al.
patent: 2003/0031340 (2003-02-01), Alattar et al.
patent: 0838061 (1996-07-01), None
patent: WO 01/74053 (2001-10-01), None
patent: WO 02/10967 (2002-02-01), None
IBM, “Watermark data-hiding for print out by printer firmware”, Research Disclosure, vol. 427, No. 96, Nov. 1999.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Device for encoding and marking of documents for... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Device for encoding and marking of documents for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for encoding and marking of documents for... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4108171

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.