Tzyy-Shuh Chang

This inventor holds 14 USPTO granted patents and 2 published patent applications, plus 2 CIPO patents and 2 EPO patents. Top assignees: Og Technologies, Inc., Other. Active years: 2003-2026.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tzyy-Shuh Chang. Retrieved from https://idiyas.com/inventor/tzyy-shuh-chang

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 14 (Patent Applications = 2)

% Patents Active = 64.3

CIPO Patents = 2

EPO Patents = 2 (Patent Applications = 1)

Average Co-Inventor Count = 2.0

ph-index = 4

Forward Citations = 56(Granted Patents)

Company Filing History:

13 out of 14

Og Technologies, Inc.

patents

1 out of 834,570

Other

patents

Years Active: 2003-2026

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14 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 12561817 - Method and apparatus for determining the speed of travel of elongated bars with surface texture (2026-02-24),

2. 9594293 - Method and apparatus for uniformly focused ring light (2017-03-14),

3. 9291877 - Method and apparatus for uniformly focused ring light (2016-03-22),

4. 8233157 - Method and apparatus of a portable imaging-based measurement with self calibration (2012-07-31),

5. 8143885 - Surface flaw detection and verification on metal bars by Eddy current testing and imaging system (2012-03-27),

6. 7861567 - Method and apparatus to control the lateral motion of a long metal bar being formed by a mechanical process such as rolling or drawing (2011-01-04),

7. 7627163 - Apparatus and method for detecting surface defects on a workpiece such as a rolled/drawn metal bar (2009-12-01),

8. 7460703 - Apparatus and method for detecting surface defects on a workpiece such as a rolled/drawn metal bar (2008-12-02),

9. 7324681 - Apparatus and method for detecting surface defects on a workpiece such as a rolled/drawn metal bar (2008-01-29),

10. 7275404 - Method and an apparatus to control the lateral motion of a long metal bar being formed by a mechanical process such as rolling or drawing (2007-10-02),

11. 6992756 - Apparatus and method for movement measurement and position tracking of long, non-textured metal objects at an elevated temperature (2006-01-31),

12. 6950546 - Apparatus and method for detecting surface defects on a workpiece such as a rolled/drawn metal bar (2005-09-27),

13. 6859285 - Optical observation device and method for observing articles at elevated temperatures (2005-02-22),

14. 6661506 - Engine bearing inspection system (2003-12-09),

Profile summary based on public USPTO records.