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For the Inventor, By the Inventor

Tokyo, Japan

Sumitomo Light Metal Industries, Ltd.

Calculating rank
USPTO Granted Patents = 140

% Expired Patents = 10.0



Forward Citations = 1,275

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252 inventors (with patents filed for the assignee):

goldMedal Masaki Kumagai (13 out of 16 patents)

silverMedal Yoshio Baba (13 out of 14 patents)

bronzeMedal Shin Tsuchida (12 out of 12 patents)

4.  Yasunaga Itoh (8 out of 22 patents)

5.  Teruo Uno (8 out of 8 patents)

6.  Zenichi Tanabe (8 out of 8 patents)

7.  Masaya Takahashi (7 out of 39 patents)

8.  Naoki Yamashita (7 out of 24 patents)

9.  Hideo Yoshida (7 out of 78 patents)

10.  Toshihiko Fukuda (7 out of 27 patents)

11.  Yuji Hisatomi (7 out of 10 patents)

12.  Yoshiharu Hasegawa (7 out of 12 patents)

13.  Yoshifusa Shoji (7 out of 11 patents)

14.  Yuji Suzuki (6 out of 107 patents)

15.  Koji Nagata (6 out of 14 patents)


Core Competencies:
Heat Exchangers
Aluminum Alloys
Welding Processes
Corrosion Resistance
Extruded Products
Brazing Techniques
Anodizing
Lithographic Printing Plates
Vehicle Panels
Sheet Materials

140 patents:

1. 10307813 - Aluminum alloy heat exchanger and method of producing refrigerant tube used for the heat exchanger (2019-06-04),
2. 10301706 - Aluminum alloy sheet that exhibits excellent surface quality after anodizing and method for producing the same (2019-05-28),
3. 9440315 - Aluminum alloy heat exchanger and method of producing refrigerant tube used for the heat exchanger (2016-09-13),
4. 9132518 - Method for producing aluminum alloy heat exchanger (2015-09-15),
5. 9108239 - Sheet material having concave-convex section, and laminated structure and vehicle panel using the same (2015-08-18),
6. 9090288 - Sheet material having a concave-convex part, and vehicle panel and laminated structure using the same (2015-07-28),
7. 9051633 - Aluminum alloy welded member (2015-06-09),
8. 9012033 - Aluminum alloy clad sheet for heat exchangers (2015-04-21),
9. 8828156 - Aluminum sheet material for lithographic printing plates (2014-09-09),
10. 8742294 - MIG welded joint between aluminum and steel members and MIG welding process (2014-06-03),
11. 8714631 - Raised and recessed sheet material, and vehicle panel and laminated structure using the same (2014-05-06),
12. D685194 - Metal sheet material (2013-07-02),
13. D680750 - Metal sheet material (2013-04-30),
14. D680749 - Metal sheet material (2013-04-30),
15. D673779 - Metal sheet material (2013-01-08),
Company Overview
Sumitomo Light Metal Industries, Ltd., based in Tokyo, specializes in aluminum alloy technology, focusing on the development and manufacturing of advanced materials and components. The company is recognized for its expertise in heat exchangers, aluminum alloys, and various welding processes, ensuring high performance and durability in its products. Additionally, it excels in corrosion resistance, extruded products, brazing techniques, anodizing, and lithographic printing plates, catering to diverse industrial applications and contributing to innovation in the materials sector.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

140 Patents

#444 in Tokyo

#899 in Japan

#5,796 in the World

Tokyo, JP
Tokyo, Japan

Sumitomo Light Metal Industries, Ltd.

Forward Citations = 1,275

252 inventors:

goldMedal Masaki Kumagai (13 out of 16 patents)

silverMedal Yoshio Baba (13 out of 14 patents)

bronzeMedal Shin Tsuchida (12 out of 12 patents)

4.  Yasunaga Itoh (8 out of 22 patents)

5.  Teruo Uno (8 out of 8 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Sumitomo Light Metal Industries, Ltd.. Retrieved from https://idiyas.com/company/sumitomo-light-metal-industries

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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