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Zuiko Corporation

USPTO Granted Patents = 185

% Expired Patents = 16.2

EPO Patents = 126

Forward Citations = 1,432

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67 inventors (with patents filed for the assignee):

Toyoshi Umebayashi (35 out of 35 patents)

Masaki Nakakado (22 out of 22 patents)

Hideyuki Nakamura (20 out of 32 patents)

4. Takao Wada (17 out of 18 patents)

5. Yukihiko Fujita (16 out of 16 patents)

6. Takahiro Shimada (15 out of 16 patents)

7. Hitoshi Sato (13 out of 13 patents)

8. Yoshiaki Tsujimoto (12 out of 12 patents)

9. Miwa Koshijima (10 out of 14 patents)

10. Ikuo Tachibana (9 out of 9 patents)

11. Takashi Arima (8 out of 8 patents)

12. Shuhei Kurata (8 out of 9 patents)

13. Satoshi Tanaka (8 out of 28 patents)

14. Daisuke Inoue (7 out of 81 patents)

15. Hideki Fujita (7 out of 9 patents)

Core Competencies:

Wearable Article

Absorbent Body

Stretchable Sheet

Ultrasonic Welding

Disposable Diaper

Manufacturing Method

Composite Sheet

Folding Device

Production Apparatus

Elastic Composite

Sheet Supply Device

Conveying Device

185 patents: Sort by Forward Citations

1. 12643746 - Transport device (2026-06-02),

2. 12642710 - Composite stretchable member and wearable article using same (2026-06-02),

3. 12642709 - Apparatus and method for manufacturing absorbent core for disposable wearable articles (2026-06-02),

4. 12629291 - Wearable article production method, wearable article, and wearable article production device (2026-05-19),

5. 12599513 - Stretch layered sheet, disposable wearing article, and method and device for manufacturing stretch layered sheet (2026-04-14),

6. 12582563 - Reclosable underwear-type disposable article for wearing and manufacturing method therefor (2026-03-24),

7. 12527698 - Method for producing wearable article (2026-01-20),

8. 12521282 - Absorbent body production device and absorbent body production method (2026-01-13),

9. 12458542 - Apparatus and method for manufacturing absorbent body (2025-11-04),

10. 12409610 - Apparatus and method for ultrasonic welding (2025-09-09),

11. 12403045 - Manufacturing apparatus and method for absorbent body (2025-09-02),

12. 12384645 - Method and device for manufacturing wearable article (2025-08-12),

13. 12337580 - Apparatus and method for manufacturing laminate (2025-06-24),

14. 12207993 - Method for producing cuffs for wearable article (2025-01-28),

15. 12202212 - Method for manufacturing wearable article (2025-01-21),

Zuiko Corporation, headquartered in Osaka, Japan, specializes in the manufacturing of wearable articles, focusing on innovative solutions for absorbent products. The company is recognized for its advancements in core technologies such as stretchable sheets, ultrasonic welding, and composite materials. Zuiko's expertise extends to the development of manufacturing methods and folding devices, particularly for disposable diapers, positioning it as a key player in the wearable article sector. The organization is committed to enhancing product functionality and user comfort through continuous research and development.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

Zuiko Corporation

185 Patents

#80 in Osaka

#748 in Japan

#4,526 in the World

Zuiko Corporation

Forward Citations = 1,432

67 inventors:

Toyoshi Umebayashi (35 out of 35 patents)

Masaki Nakakado (22 out of 22 patents)

Hideyuki Nakamura (20 out of 32 patents)

4. Takao Wada (17 out of 18 patents)

5. Yukihiko Fujita (16 out of 16 patents)

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