Chang; Zhiguo

Patent Applications and Registrations

Patent applications and USPTO patent grants for Chang; Zhiguo.The latest application filed is for "two-dimensional dot matrix barcode encoding and reading methods".

Company Profile

0.6.9

Chang; Zhiguo - Guangdong CN
CHANG; Zhiguo - Shenzhen 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
Two-dimensional dot matrix barcode encoding and reading methods Grant 10,410,104 - Li , et al. Sept	2019-09-10
Two-dimensional dot matrix barcode encoding and identifying methods Grant 10,410,103 - Li , et al. Sept	2019-09-10
Two-dimensional Dot Matrix Barcode Encoding and Reading Methods App 20180341845 - LI; Zhengfang ; et al.	2018-11-29
Two-dimensional Dot Matrix Barcode Encoding and Identifying Methods App 20180341844 - LI; Zhengfang ; et al.	2018-11-29
Decoding method for matrix two-dimensional code Grant 9,665,759 - Li , et al. May 30, 2	2017-05-30
Method For Decoding Matrix-type Two-dimensional Code App 20150129658 - Li; Zhengfang ; et al.	2015-05-14
2D coding and decoding barcode and its method thereof Grant 7,497,380 - Chang , et al. March 3, 2	2009-03-03
Scanning device with a positioning sensor and a corresponding processing method to obtain images Grant 7,386,189 - Zhang , et al. June 10, 2	2008-06-10
Two-directional Bar Code Symbol And Its Encoding & Decoding Method App 20070272755 - CHANG; Zhiguo ; et al.	2007-11-29
2D coding and decoding barcode and its method thereof Grant 7,264,174 - Chang , et al. September 4, 2	2007-09-04
2D coding and decoding barcode and its method thereof App 20070114285 - Chang; Zhiguo ; et al.	2007-05-24
Information Card with Multiple Storage Media and a Device and Method for Reading and Writing Information in Said Card App 20070084933 - Zhang; Wei ; et al.	2007-04-19
2D coding and decoding barcode and its method thereof App 20050199721 - Chang, Zhiguo ; et al.	2005-09-15
Information card with multiple storage media and a device and method for reading and writing information in said card App 20050092844 - Zhang, Wei ; et al.	2005-05-05
Scanning device with a positioning sensor and a corresponding processing method to obtain images App 20050094902 - Zhang, Wei ; et al.	2005-05-05

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