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For the Inventor, By the Inventor

Taichung, Taiwan

Door & Window Hardware Co.

Calculating rank
USPTO Granted Patents = 18

% Expired Patents = 55.6

Trademarks = 1

Forward Citations = 186

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13 inventors (with patents filed for the assignee):

goldMedal Wei-Hung Chang (10 out of 11 patents)

silverMedal Sung-Hui Lin (6 out of 6 patents)

bronzeMedal Chih-Lun Hsieh (4 out of 5 patents)

4.  James Chang (2 out of 7 patents)

5.  Fanny Chiang (2 out of 14 patents)

6.  Ching-Ko Lin (1 out of 5 patents)

7.  Ko-Yu Chang (1 out of 2 patents)

8.  Tung-Hsuan Tsai (1 out of 1 patent)

9.  Dong-Shiuan Tsai (1 out of 1 patent)

10.  Hsing-Hui Huang (1 out of 1 patent)

11.  Hong-Sen Yan (1 out of 1 patent)

12.  Yi-Ming Lin (1 out of 1 patent)

13.  Jung-Chang Peng (1 out of 1 patent)


18 patents:

1. 10448754 - Clamp (2019-10-22),
2. 10323438 - Two-point lock (2019-06-18),
3. 9309691 - Sliding-door handle device (2016-04-12),
4. 9145720 - Magnetic locking apparatus (2015-09-29),
5. 9140043 - Hydraulic hinge buffer assembly for a door (2015-09-22),
6. 8955195 - Clamping-sliding assembly for a single-track-suspension sliding door (2015-02-17),
7. 8875549 - Lock assembly (2014-11-04),
8. 8745821 - Auto-closing device for a sliding door (2014-06-10),
9. 8407941 - Driving device for driving two door panels to synchronously move (2013-04-02),
10. 8307497 - Soft-closing device for a sliding door (2012-11-13),
11. 7963077 - Rail assembly for a glass door (2011-06-21),
12. 7841048 - Sliding assembly having a body for transversal sliding door (2010-11-30),
13. 7661279 - Lock assembly (2010-02-16),
14. 7637059 - Roller assembly for a frameless sliding glass door (2009-12-29),
15. 7516992 - Latch Structure (2009-04-14),
Company Overview
Door & Window Hardware Co. is a leading manufacturer based in Taichung, Taiwan, specializing in high-quality hardware solutions for doors and windows. The company focuses on developing innovative products that enhance security, functionality, and aesthetics in residential and commercial applications. With a commitment to quality and design, Door & Window Hardware Co. leverages advanced manufacturing techniques and materials to meet the evolving needs of the construction and architectural industries.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

Door & Window Hardware Co. USPTO Patent Assignee Logo
18 Patents

#97 in Taichung

#900 in Taiwan

#34,263 in the World

Taichung, TW
Taichung, Taiwan

Door & Window Hardware Co.

Forward Citations = 186

13 inventors:

goldMedal Wei-Hung Chang (10 out of 11 patents)

silverMedal Sung-Hui Lin (6 out of 6 patents)

bronzeMedal Chih-Lun Hsieh (4 out of 5 patents)

4.  James Chang (2 out of 7 patents)

5.  Fanny Chiang (2 out of 14 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Door & Window Hardware Co.. Retrieved from https://idiyas.com/company/door-and-window-hardware-company

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

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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