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Nkk Corporation

USPTO Granted Patents = 614

EPO Patents = 1

Forward Citations = 5,857

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1,126 inventors (with patents filed for the assignee):

Tadashi Inoue (35 out of 42 patents)

Tomoyoshi Okita (25 out of 25 patents)

Masaaki Yamashita (24 out of 45 patents)

4. Toyofumi Watanabe (22 out of 25 patents)

5. Hiroaki Nishio (20 out of 37 patents)

6. Yoshihiro Hosoya (18 out of 25 patents)

7. Kiyoshi Tsuru (17 out of 17 patents)

8. Giichi Matsuo (16 out of 18 patents)

9. Toshiaki Urabe (16 out of 19 patents)

10. Haruyoshi Tanabe (15 out of 16 patents)

11. Hiroshi Kagechika (14 out of 17 patents)

12. Masahiro Kawakami (14 out of 16 patents)

13. Katsuhiro Iwasaki (14 out of 17 patents)

14. Kuninori Minakawa (14 out of 15 patents)

15. Yasunori Yoshie (14 out of 15 patents)

Core Competencies:

Steel Manufacturing

Hot-Dip Galvanizing

Cold-Rolled Steel Sheet

High Strength Steel

Galvanized Steel Sheet

Optically Active Compounds

Waste Plastics Separator

Thermal Storage Systems

3D Coordinate Measuring

Dimethyl Ether Production

Surface Treatment

Oxygen Blowing Technology

614 patents: Sort by Forward Citations

1. 7599052 - Method for marking defect and device therefor (2009-10-06),

2. 7448430 - Manufacturing method for continuously cast product of steel (2008-11-11),

3. 7423744 - Method for marking defect and device therefor (2008-09-09),

4. 7361385 - Method for manufacturing hot-dip plated metal strip and apparatus for manufacturing the same (2008-04-22),

5. 7252722 - Steel sheet (2007-08-07),

6. 7248366 - Method for marking defect and device therefor (2007-07-24),

7. RE39475 - Digitizer having flat tablet with magnetic shield plate (2007-01-22),

8. 7156148 - Manufacturing method for continuously cast product of steel (2007-01-02),

9. 7137283 - Plate reduction press apparatus and methods (2006-11-21),

10. 6896035 - Manufacturing method for continuously cast product of steel (2005-05-24),

11. 6887820 - Method for producing optically active compounds (2005-05-03),

12. 6880619 - HEAT TREATING PLANT, INSTALLATION METHOD FOR POROUS REGENERATIVE ELEMENT, PRODUCTION METHOD FOR HEAT TREATED SUBSTANCE, SELECTION METHOD FOR POROUS REGENERATIVE ELEMENT, AND SPENT POROUS REGENERATIVE ELEMENT COMPONENT MEMBER (2005-04-19),

13. 6869691 - High strength hot-dip galvanized steel sheet and method for manufacturing the same (2005-03-22),

14. 6843843 - Underwater immersion block and method to produce the same (2005-01-18),

15. 6837916 - Smelting reduction method (2005-01-04),

NKK Corporation is a multinational company specializing in the manufacture and supply of various industrial products and services. With a diverse portfolio, NKK Corporation operates in sectors such as steel production, engineering, construction, machinery, and environmental conservation. They are committed to providing high-quality and innovative solutions to meet the evolving needs of their customers worldwide.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

614 Patents

#137 in Tokyo

#315 in Japan

#1,555 in the World

Nkk Corporation

Forward Citations = 5,857

1,126 inventors:

Tadashi Inoue (35 out of 42 patents)

Tomoyoshi Okita (25 out of 25 patents)

Masaaki Yamashita (24 out of 45 patents)

4. Toyofumi Watanabe (22 out of 25 patents)

5. Hiroaki Nishio (20 out of 37 patents)

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