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For the Inventor, By the Inventor

Vancouver, Canada

Tech4u Dynamics Inc.


USPTO Granted Patents = 1

% Expired Patents = 100.0

Forward Citations = 0

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1 inventor (with patents filed for the assignee):

goldMedal Shizhong Duan (1 out of 9 patents)


1 patent:

1. 9045151 - Track barcode systems for railroad management (2015-06-02),
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USPTO Data Jan 1 1976 - Sep 15 2026

1 Patents

#590 in Vancouver

#9,430 in Canada

Vancouver, CA
Vancouver, Canada

Tech4u Dynamics Inc.

Forward Citations = 0

1 inventor:

goldMedal Shizhong Duan (1 out of 9 patents)

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