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For the Inventor, By the Inventor

Tokyo, Japan

Ykk Corporation


USPTO Granted Patents = 1,406

% Expired Patents = 7.8



Trademarks = 59

Forward Citations = 11,563

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920 inventors (with patents filed for the assignee):

goldMedal Keiichi Keyaki (79 out of 87 patents)

silverMedal Ryoichiro Uehara (57 out of 58 patents)

bronzeMedal Ryuichi Murasaki (55 out of 78 patents)

4.  Yoshikazu Hamada (39 out of 39 patents)

5.  Yohei Miyazaki (39 out of 39 patents)

6.  Tsuyoshi Minato (36 out of 38 patents)

7.  Mitsuru Akeno (36 out of 40 patents)

8.  Shigeyoshi Takazawa (35 out of 36 patents)

9.  Hitoshi Kaneko (32 out of 53 patents)

10.  Toshiaki Takizawa (31 out of 53 patents)

11.  Yuichi Iwase (31 out of 31 patents)

12.  Masayoshi Kojima (30 out of 30 patents)

13.  Koji Yamagishi (29 out of 29 patents)

14.  Kenichi Yoshie (28 out of 28 patents)

15.  Takanori Ozawa (26 out of 26 patents)


Core Competencies:
Slide Fastener
Waterproof Chain
Fastening Method
Slider
Fastener Stringer
Sewing Device
Clip Assembly
Surface Fastener
Buckle
Fastener Chain
Aluminum Alloy
Knitted Fastener

1,406 patents:

1. 12733718 - Slider (2026-09-15),
2. D1145557 - Fastener for packaging (2026-09-01),
3. 12714207 - Surface fastener (2026-08-25),
4. D1142020 - Chain for Slide Fastener (2026-08-18),
5. 12697911 - Vehicle seat assembly device (2026-08-04),
6. 12696962 - Slider and slide fastener (2026-08-04),
7. 12685370 - Slider for slide fastener and slide fastener including the same (2026-07-21),
8. D1133999 - Buckle (2026-07-14),
9. 12674479 - Clip member (2026-07-07),
10. 12667828 - Hydrocarbon synthesis catalyst, method for manufacturing same, and method for synthesizing hydrocarbons (2026-06-30),
11. 12660941 - Sheet fastener (2026-06-23),
12. D1130183 - Slider for slide fastener (2026-06-16),
13. D1128429 - Slider for slide fastener (2026-06-02),
14. 12638038 - Rotary connecting structure and rotary coupler (2026-05-26),
15. 12635771 - Slider for slide fastener (2026-05-26),
YKK Corporation, headquartered in Tokyo, Japan, is a global leader in the manufacturing of slide fasteners and related fastening products. The company specializes in innovative technologies such as waterproof chains, fastening methods, and various slider designs, catering to diverse industries including apparel, automotive, and outdoor gear. YKK is committed to quality and sustainability, continually advancing its core technologies to enhance functionality and performance in fastening solutions.
Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Sep 29 2026

1,406 Patents

#86 in Tokyo

#162 in Japan

#709 in the World

Tokyo, JP
Tokyo, Japan

Ykk Corporation

Forward Citations = 11,563

920 inventors:

goldMedal Keiichi Keyaki (79 out of 87 patents)

silverMedal Ryoichiro Uehara (57 out of 58 patents)

bronzeMedal Ryuichi Murasaki (55 out of 78 patents)

4.  Yoshikazu Hamada (39 out of 39 patents)

5.  Yohei Miyazaki (39 out of 39 patents)

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