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Sumitomo Metal Industries, Inc.

USPTO Granted Patents = 929

CIPO Patents = 414

EPO Patents = 91

Trademarks = 10

Forward Citations = 9,268

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2,097 inventors (with patents filed for the assignee):

Chihiro Hayashi (29 out of 34 patents)

Kunio Kondo (29 out of 59 patents)

Tomio Yamakawa (23 out of 37 patents)

4. Kazuhiro Ogawa (21 out of 41 patents)

5. Masaaki Igarashi (20 out of 58 patents)

6. Kazuhiro Shimoda (19 out of 38 patents)

7. Yasutaka Okada (18 out of 20 patents)

8. Tomohiko Omura (16 out of 36 patents)

9. Kunio Goto (15 out of 42 patents)

10. Sumio Iida (14 out of 16 patents)

11. Yuji Arai (13 out of 202 patents)

12. Shigeo Nagasaku (13 out of 19 patents)

13. Masakatsu Ueda (12 out of 13 patents)

14. Toshiyuki Matsumoto (12 out of 34 patents)

15. Kazuyuki Nakasuji (12 out of 13 patents)

Core Competencies:

Threaded Connection

Hydrocarbon Wells

Galling-Resistant Tubular Component

Seamless Steel Pipe

High-Pressure Hydrogen

Lubricant Composition

Ultrasonic Testing

Austenitic Heat Resistant Alloy

Ni-Based Alloy Tube

Continuous Casting Method

Inspection Method

Chemical Conversion Treatment

929 patents: Sort by Forward Citations

1. 9909371 - Assembly for producing a threaded connection, method for making up and breaking out said connection and use of said connection in a work over riser (2018-03-06),

2. 9822591 - Tubular component for drilling and operating hydrocarbon wells, and resulting threaded connection (2017-11-21),

3. 9290714 - Galling-resistant threaded tubular component and process for coating said component (2016-03-22),

4. 9273521 - Threaded connection (2016-03-01),

5. 9206376 - Galling-resistant threaded tubular component, and process for coating said component (2015-12-08),

6. 9109726 - Set for obtaining a threaded connection, method for making up and breaking out said connection, and use of said connection in a riser (2015-08-18),

7. 8925975 - Set for producing a threaded connection for drilling and operating hydrocarbon wells, and resulting threaded connection (2015-01-06),

8. 8863564 - Lubricant composition for hot metal working and method of hot metal working using the same (2014-10-21),

9. 8827322 - Threaded connection for drilling and operating hydrocarbon wells (2014-09-09),

10. 8795450 - Manufacturing method for a steel pipe for fuel injection pipe (2014-08-05),

11. 8770003 - Method for producing seamless pipe and method for determining length of billet for use in producing seamless pipe (2014-07-08),

12. 8735334 - Lubrication composition with an adaptable coefficient of friction, for a threaded element of a threaded tubular connection component (2014-05-27),

13. 8678448 - Threaded connection (2014-03-25),

14. 8663400 - Low alloy steel for high-pressure hydrogen gas environment and container for high-pressure hydrogen (2014-03-04),

15. 8544179 - Inspection method of gauge for a self-locking threading of a tubular connection used in the oil industry (2013-10-01),

Sumitomo Metal Industries, Inc. (now Nippon Steel Corporation) is a leading global steel manufacturing company headquartered in Tokyo, Japan. The company specializes in the production of high-grade steel products for various industries such as automotive, energy, infrastructure, and machinery. With a strong focus on research and development, Sumitomo Metal Industries continuously strives to innovate and create advanced steel solutions that meet the evolving needs of its customers worldwide.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

929 Patents

#108 in Tokyo

#235 in Japan

#1,064 in the World

Sumitomo Metal Industries, Inc.

Forward Citations = 9,268

2,097 inventors:

Chihiro Hayashi (29 out of 34 patents)

Kunio Kondo (29 out of 59 patents)

Tomio Yamakawa (23 out of 37 patents)

4. Kazuhiro Ogawa (21 out of 41 patents)

5. Masaaki Igarashi (20 out of 58 patents)

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