Qi; Wenfa

Patent Applications and Registrations

Patent applications and USPTO patent grants for Qi; Wenfa.The latest application filed is for "watermarking image block division method and device for western language watermarking processing".

Company Profile

0.6.6

Qi; Wenfa - Beijing CN

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Watermarking image block division method and device for western language watermarking processing Grant 9,111,341 - Wang , et al. August 18, 2	2015-08-18
Method and system for document printing management and control, and document source tracking Grant 8,976,383 - Qi , et al. March 10, 2	2015-03-10
Watermarking Image Block Division Method And Device For Western Language Watermarking Processing App 20140003649 - Wang; Gaoyang ; et al.	2014-01-02
Method And System For Document Printing Management And Control, And Document Source Tracking App 20130335785 - Qi; Wenfa ; et al.	2013-12-19
Method of document protection Grant 8,120,795 - Qi , et al. February 21, 2	2012-02-21
Methods and apparatus for embedding and detecting digital watermarks in a text document Grant 8,107,129 - Yang , et al. January 31, 2	2012-01-31
Method of document protection App 20090257076 - Qi; Wenfa ; et al.	2009-10-15
Methods and Apparatus for Embedding and Detecting Digital Watermarks in a Text Document App 20080297853 - Yang; Bin ; et al.	2008-12-04

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