This inventor holds 4 USPTO granted patents. Top assignees: Konica Minolta Laboratory U.s.a., Inc., Konica Minolta Systems Laboratory, Inc.. Active years: 2011-2012.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
3 out of 442 
1 out of 39 
Years Active: 2011-2012
Title: Maria Qian Zhao: Innovator in Document Authentication
Introduction
Maria Qian Zhao is a notable inventor based in San Pablo, CA. She has made significant contributions to the field of document authentication, holding a total of 4 patents. Her innovative methods focus on ensuring the integrity and authenticity of printed documents.
Latest Patents
One of her latest patents is titled "Determining document authenticity in a closed-loop process." This method utilizes a watermark added to a printed document to detect any alterations made after printing. The process involves overlapping a visible watermark with an original digital image, which is then printed as a halftone image. The watermark appears as a light gray shade, and when the document is scanned back at a higher resolution, altered areas can be identified by their flat appearance, while unaltered areas show density variations due to the watermark dots.
Another significant patent is "Creation and placement of two-dimensional barcode stamps on printed documents for storing authentication information." This method generates small-sized two-dimensional barcode stamps that are distributed across a printed document. These stamps collectively encode the document's content for authentication purposes. The stamps can be strategically placed in the empty spaces of paragraphs or lines, ensuring that each segment of the document is encoded with authentication data.
Career Highlights
Maria has worked with prominent companies such as Konica Minolta Laboratory U.S.A., Inc. and Konica Minolta Systems Laboratory, Inc. Her experience in these organizations has allowed her to develop and refine her innovative approaches to document authentication.
Collaborations
Maria has collaborated with her coworker, Wei Ming, who has contributed to her projects and research endeavors.
Conclusion
Maria Qian Zhao is a pioneering inventor whose work in document authentication has the potential to enhance security and integrity in various applications. Her innovative patents reflect her commitment to advancing technology in this critical area.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile