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Showa Aluminum Corporation

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USPTO Granted Patents = 152

% Expired Patents = 1.3

Forward Citations = 2,295

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214 inventors (with patents filed for the assignee):

Ryotatsu Otsuka (13 out of 14 patents)

Toshinori Tokutake (12 out of 17 patents)

Yuji Yamamoto (10 out of 12 patents)

4. Minobu Sukimoto (10 out of 10 patents)

5. Yuichi Furukawa (9 out of 15 patents)

6. Kazuo Toyoda (9 out of 9 patents)

7. Ichiro Iwai (9 out of 15 patents)

8. Shinji Ito (8 out of 11 patents)

9. Masahiro Kojima (8 out of 9 patents)

10. Eizo Isoyama (8 out of 9 patents)

11. Shigemi Tanimoto (8 out of 8 patents)

12. Hirosaburo Hirano (8 out of 10 patents)

13. Nobuyuki Okuda (7 out of 27 patents)

14. Shoichi Sato (7 out of 8 patents)

15. Tatsuya Hanafusa (6 out of 13 patents)

Core Competencies:

Heat Exchanger

Aluminum Alloy

Thermal Conductivity

Brazing

Friction Agitation

Evaporator

Refrigerant Tubes

Magnetic Disk

Heat Sink

Automotive Components

Vibration Isolator

Aluminum Weldment

152 patents: Sort by Forward Citations

1. 6660111 - Method of manufacturing Al-Mg-Si series alloy plate excellent in thermal conductivity and intensity (2003-12-09),

2. 6585147 - Friction agitation joining method (2003-07-01),

3. 6572721 - Method of manufacturing automotive sunshade panel (2003-06-03),

4. 6301115 - Heat sink devices for use in electronic devices (2001-10-09),

5. 6258458 - Magnetic disk substrate (2001-07-10),

6. 6241011 - Layered heat exchangers (2001-06-05),

7. 6239390 - Personal computer keyboard (2001-05-29),

8. 6230407 - Method of checking whether noncondensable gases remain in heat pipe and process for producing heat pipe (2001-05-15),

9. 6227432 - Friction agitation jointing method of metal workpieces (2001-05-08),

10. 6220343 - Connecting device for heat exchanger (2001-04-24),

11. 6214135 - Entry board for drilling small holes, a method of making the same and a method for drilling small holes through a printed circuit board by using said entry board (2001-04-10),

12. 6200642 - Method of producing brazeable aluminum material (2001-03-13),

13. 6196019 - Accumulator (2001-03-06),

14. 6170738 - Aluminum brazing alloy for cold brazing and method for brazing low-melting aluminum material (2001-01-09),

15. 6170567 - Heat exchanger (2001-01-09),

Company Overview

Showa Aluminum Corporation, headquartered in Osaka, Japan, specializes in advanced heat exchanger technology, focusing on the development and manufacturing of high-performance aluminum components. The company is recognized for its expertise in aluminum alloys, enhancing thermal conductivity through innovative processes such as brazing and friction agitation. Showa Aluminum's product offerings include evaporators and refrigerant tubes, catering to various industries that require efficient thermal management solutions.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

152 Patents

#89 in Osaka

#847 in Japan

#5,382 in the World

Showa Aluminum Corporation

Forward Citations = 2,295

214 inventors:

Ryotatsu Otsuka (13 out of 14 patents)

Toshinori Tokutake (12 out of 17 patents)

Yuji Yamamoto (10 out of 12 patents)

4. Minobu Sukimoto (10 out of 10 patents)

5. Yuichi Furukawa (9 out of 15 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Showa Aluminum Corporation. Retrieved from https://idiyas.com/company/showa-aluminum

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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