% Expired Patents = 16.7

Forward Citations = 79

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23 inventors (with patents filed for the assignee):

Hideki Itoh (1 out of 5 patents)

Kazuya Ohmatsu (1 out of 20 patents)

Yuuichi Ashibe (1 out of 12 patents)

4. Tetsuji Jodai (1 out of 51 patents)

5. Masayuki Nagata (1 out of 9 patents)

6. Mikao Nakajima (1 out of 9 patents)

7. Michio Fukuda (1 out of 15 patents)

8. Kazuhisa Yamauchi (1 out of 4 patents)

9. Tetsuya Ishida (1 out of 1 patent)

10. Tomoji Gotoh (1 out of 1 patent)

11. Syuji Yazu (1 out of 1 patent)

12. Shigeo Saito (1 out of 6 patents)

13. Sinkichi Miwa (1 out of 4 patents)

14. Toshitada Onishi (1 out of 4 patents)

15. Hiroshi Tateishi (1 out of 2 patents)

6 patents: Sort by Forward Citations

1. 7989702 - Sealing-end structure for superconducting cable (2011-08-02),

2. 5578984 - Tire air pressure reduction detecting method and apparatus (1996-11-26),

3. 4906609 - Fabrication of superconducting oxide wires by powder-in-tube method (1990-03-06),

4. 4849282 - Prestressing steel material (1989-07-18),

5. 4614135 - Stripping device for stripping coated wire (1986-09-30),

6. 4506109 - Al-stabilized superconducting wire and the method for producing the same (1985-03-19),

Company Overview

Sumitomo Electric Industries, Ltd. is a Japanese company that manufactures a wide range of products, including automotive parts, electrical wires, and power cables. The company is known for its cutting-edge technology and commitment to sustainability. With a global presence, Sumitomo Electric continues to innovate and provide solutions to meet the evolving needs of its customers.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

6 Patents

#651 in Osaka

#5,990 in Japan

Osaka, Japan

Sumitomo Electric, Ltd.

Forward Citations = 79

23 inventors:

Hideki Itoh (1 out of 5 patents)

Kazuya Ohmatsu (1 out of 20 patents)

Yuuichi Ashibe (1 out of 12 patents)

4. Tetsuji Jodai (1 out of 51 patents)

5. Masayuki Nagata (1 out of 9 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Sumitomo Electric, Ltd.. Retrieved from https://idiyas.com/company/sumitomo-electric

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]