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Bridgestone Metalpha Corporation

USPTO Granted Patents = 17

% Expired Patents = 11.8

Forward Citations = 76

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18 inventors (with patents filed for the assignee):

Naohiko Obana (6 out of 16 patents)

Yoshikazu Kaneko (4 out of 5 patents)

Tatsuo Hirayama (3 out of 3 patents)

4. Yukio Aoike (3 out of 3 patents)

5. Tadashi Takahashi (3 out of 3 patents)

6. Shuichi Onuma (2 out of 5 patents)

7. Kazuto Fujita (2 out of 7 patents)

8. Shuji Amamoto (2 out of 2 patents)

9. Motonori Bundo (2 out of 7 patents)

10. Takaya Yamanaka (1 out of 5 patents)

11. Eiji Kudo (1 out of 5 patents)

12. Noboru Kusaba (1 out of 2 patents)

13. Ryuzo Osawa (1 out of 2 patents)

14. Masami Goto (1 out of 1 patent)

15. Yoshihiro Miura (1 out of 1 patent)

17 patents: Sort by Forward Citations

1. 6338780 - Apparatus for manufacturing metallic fibers and method of manufacturing colored metallic fiber (2002-01-15),

2. 6325875 - Titanium fiber and method of producing the same (2001-12-04),

3. 6316122 - Titanium fiber and method of producing the same (2001-11-13),

4. 6270913 - Apparatus for manufacturing metallic fibers, method of manufacturing twine of metallic fibers, twine of metallic fibers and method of coloring metallic fiber (2001-08-07),

5. 6102095 - Corrosion resistant steel cords and pneumatic tires reinforced with same (2000-08-15),

6. 5873962 - Tire having corrosion resistant steel cord (1999-02-23),

7. 5858200 - Method of and apparatus for manufacturing metallic fiber and the twine (1999-01-12),

8. 5822973 - Corrosion resistant steel filament (1998-10-20),

9. 5806296 - Corrosion resistant spiral steel filament and steel cord made therefrom (1998-09-15),

10. 5709073 - Steel cords for the reinforcement of rubber articles having a wrapping (1998-01-20),

11. 5706641 - Steel cord having layer-twisted structure of helicoidal filaments for (1998-01-13),

12. 5677088 - Nickel electrode plate for an alkaline storage battery (1997-10-14),

13. 5669577 - Winding device (1997-09-23),

14. 5651246 - Method of production of steel cord for reinforcing products having a (1997-07-29),

15. 5605036 - Steel cords for the reinforcement of rubber articles and having a (1997-02-25),

Company Overview

Bridgestone Metalpha Corporation, based in Tokyo, specializes in the development and manufacturing of advanced materials, particularly in the field of steel cord for tires. The company focuses on enhancing tire performance through innovative engineering and material science. Bridgestone Metalpha plays a crucial role in the automotive industry by providing high-quality components that contribute to safety, durability, and efficiency in tire production, aligning with Bridgestone's commitment to sustainable mobility solutions.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

17 Patents

#1,454 in Tokyo

#3,227 in Japan

#35,918 in the World

Bridgestone Metalpha Corporation

Forward Citations = 76

18 inventors:

Naohiko Obana (6 out of 16 patents)

Yoshikazu Kaneko (4 out of 5 patents)

Tatsuo Hirayama (3 out of 3 patents)

4. Yukio Aoike (3 out of 3 patents)

5. Tadashi Takahashi (3 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Bridgestone Metalpha Corporation. Retrieved from https://idiyas.com/company/bridgestone-metalpha

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]

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