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Mitsubishi Steel Mfg. Co., Ltd.

USPTO Granted Patents = 106

CIPO Patents = 13

EPO Patents = 56

Forward Citations = 600

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145 inventors (with patents filed for the assignee):

Yasuhiro Mitsui (21 out of 21 patents)

Hitoshi Sato (9 out of 49 patents)

Toru Hirokane (8 out of 8 patents)

4. Tatsuo Fukuzumi (8 out of 10 patents)

5. Hironobu Sayama (7 out of 7 patents)

6. Yuji Soda (7 out of 7 patents)

7. Toshio Omi (6 out of 7 patents)

8. Sakae Higano (6 out of 6 patents)

9. Hiroshi Kurabayashi (4 out of 7 patents)

10. Takashi Eto (4 out of 4 patents)

11. Tetsuya Katsuta (4 out of 4 patents)

12. Motoyuki Sato (4 out of 4 patents)

13. Minoru Ohiraki (4 out of 4 patents)

14. Katsuyuki Uchibori (4 out of 4 patents)

15. Takafumi Fujita (4 out of 11 patents)

Core Competencies:

Elastic Member

Hinge Mechanism

Atomizer Nozzle

High Strength Spring

Composite Coil Spring

Suspension Coil Spring

Spring Unit

Slide Mechanism

Electronic Device

Iron-Based Alloy Powder

Opening And Closing Device

Coil Spring Forming Apparatus

106 patents: Sort by Forward Citations

1. 12412806 - Elastic member and elastic device (2025-09-09),

2. 12326168 - Opening and closing mechanism (2025-06-10),

3. 12139949 - Hinge (2024-11-12),

4. 12135068 - Hollow spring and method of manufacturing the same (2024-11-05),

5. 12090555 - Atomizer nozzle, atomizing device, method for producing metal powder, and metal powder (2024-09-17),

6. 11965571 - Method for manufacturing spring and spring (2024-04-23),

7. 11797061 - Parallel biaxial hinge with rotation order regulating structure (2023-10-24),

8. 10987779 - Hollow spring and manufacturing method thereof (2021-04-27),

9. 10828690 - Device and method for forming end of coiled spring (2020-11-10),

10. 10752971 - High strength spring, method of manufacturing the same, steel for high strength spring, and method of manufacturing the same (2020-08-25),

11. 10300756 - Suspension coil spring (2019-05-28),

12. 10138970 - Coil spring (2018-11-27),

13. 10124646 - Method of manufacturing rubber-bush-provided stabilizer bar and rubber-bush-provided stabilizer bar (2018-11-13),

14. 9982734 - Composite coil spring (2018-05-29),

15. 9783017 - Suspension coil spring (2017-10-10),

Mitsubishi Steel Manufacturing Co., Ltd. is a global leader in the manufacturing and supply of high-quality steel products. With a rich history spanning many decades, Mitsubishi Steel has established a reputation for excellence, innovation, and customer satisfaction. Our range of products includes steel bars, plates, pipes, and wire rods, which find extensive applications in various industries such as automotive, construction, and heavy machinery. Committed to sustainability and technological advancements, Mitsubishi Steel consistently delivers superior products that meet the highest industry standards. For more information about our company and product offerings, please visit our website.

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

Company Badge

USPTO Data Jan 1 1976 - Jan 6 2026

106 Patents

#461 in

#1,065 in

#7,203 in the World

Mitsubishi Steel Mfg. Co., Ltd.

Forward Citations = 600

145 inventors:

Yasuhiro Mitsui (21 out of 21 patents)

Hitoshi Sato (9 out of 49 patents)

Toru Hirokane (8 out of 8 patents)

4. Tatsuo Fukuzumi (8 out of 10 patents)

5. Hironobu Sayama (7 out of 7 patents)

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