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For the Inventor, By the Inventor

Tokyo, Japan

Nippon Steel Sumitomo Metal Corporation


USPTO Granted Patents = 1,102



Trademarks = 41

Forward Citations = 2,057

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1,498 inventors (with patents filed for the assignee):

goldMedal Nobuhiro Fujita (31 out of 52 patents)

silverMedal Yoshiaki Nakazawa (26 out of 92 patents)

bronzeMedal Manabu Kubota (24 out of 59 patents)

4.  Riki Okamoto (22 out of 55 patents)

5.  Kunio Hayashi (22 out of 57 patents)

6.  Naoki Maruyama (21 out of 79 patents)

7.  Jun Maki (21 out of 56 patents)

8.  Atsushi Tomizawa (21 out of 34 patents)

9.  Kazuhiro Takahashi (18 out of 71 patents)

10.  Toshimasa Tomokiyo (18 out of 22 patents)

11.  Masayuki Hashimura (18 out of 28 patents)

12.  Tatsuo Yokoi (17 out of 41 patents)

13.  Hiroyuki Kawata (16 out of 68 patents)

14.  Yasuyoshi Hidaka (16 out of 27 patents)

15.  Kaoru Kawasaki (16 out of 38 patents)


Core Competencies:
Forging Roll Device
Electric Resistance Welded Steel Pipe
Eddy Current Deceleration Device
Non-Oriented Magnetic Steel Sheet
High-Strength Hot-Dip Galvanized Steel Sheet
Austenitic Stainless Steel
Impact Absorbing Member
Transverse Flux Induction Heating Device
Quenching Apparatus
Chemical Treatment Steel Sheet
Threaded Connection for Pipe
Ball Bearing

1,102 patents:

1. 11453042 - Forging roll device (2022-09-27),
2. 11326643 - Rolling sliding member and method of producing the same, and rolling bearing including rolling sliding member (2022-05-10),
3. 11028456 - Electric resistance welded steel pipe for torsion beam (2021-06-08),
4. 10888906 - Method of manufacturing piercer plug (2021-01-12),
5. 10756612 - Eddy current deceleration device (2020-08-25),
6. 10749416 - Method for manufacturing core plate (2020-08-18),
7. 10704625 - Brake disc for railway vehicle (2020-07-07),
8. 10450671 - SiC single crystal and method for producing same (2019-10-22),
9. 10359133 - Threaded connection for pipe or tube and method of producing the threaded connection for pipe or tube (2019-07-23),
10. 10358706 - Carbonitrided bearing part (2019-07-23),
11. 10354784 - Non-oriented magnetic steel sheet and method of manufacturing the same (2019-07-16),
12. 10352836 - Evaluation method of plastic material and evaluation method of deformation processing of plastic material (2019-07-16),
13. 10352831 - Method for measuring wear of railroad vehicle wheel flange (2019-07-16),
14. 10351942 - Hot-dip galvannealed hot-rolled steel sheet and process for producing same (2019-07-16),
15. 10351936 - High-strength hot-dip galvanized steel sheet and process for producing the same (2019-07-16),
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USPTO Data Jan 1 1976 - Dec 30 2025

1,102 Patents

#95 in Tokyo

#205 in Japan

#906 in the World

...
Tokyo, Japan

Nippon Steel Sumitomo Metal Corporation

Forward Citations = 2,057

1,498 inventors:

goldMedal Nobuhiro Fujita (31 out of 52 patents)

silverMedal Yoshiaki Nakazawa (26 out of 92 patents)

bronzeMedal Manabu Kubota (24 out of 59 patents)

4.  Riki Okamoto (22 out of 55 patents)

5.  Kunio Hayashi (22 out of 57 patents)

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