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For the Inventor, By the Inventor

Tokyo, Japan

T.rad Co., Ltd.


USPTO Granted Patents = 45

% Expired Patents = 40.0


Trademarks = 2

Forward Citations = 146

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61 inventors (with patents filed for the assignee):

goldMedal Atsushi Okubo (13 out of 58 patents)

silverMedal Taiji Sakai (12 out of 12 patents)

bronzeMedal Takuya Bungo (10 out of 10 patents)

4.  Yoichi Nakamura (10 out of 21 patents)

5.  Masaaki Takase (3 out of 3 patents)

6.  Jun Ono (3 out of 3 patents)

7.  Yasushi Yoshino (3 out of 3 patents)

8.  Hirohito Sugimoto (2 out of 2 patents)

9.  Noriyuki Ishii (2 out of 6 patents)

10.  Kazuo Maegawa (2 out of 2 patents)

11.  Kiyoshi Sasaki (2 out of 2 patents)

12.  Toshikatsu Hachiya (2 out of 2 patents)

13.  Toshimichi Kobayashi (2 out of 2 patents)

14.  Takeshi Kuwabara (2 out of 2 patents)

15.  Yoshio Tomizawa (2 out of 2 patents)


Core Competencies:
Heat Exchanger
Plate Laminate
Corrugated Fin
EGR Cooler
Thermal Storage
Axial-Flow Fan
Brazing Method
Aluminum Alloy
Machining Method
Double-Pipe
Exhaust Gas
Tank Structure

45 patents:

1. 12259201 - Header plates structure of heat exchanger (2025-03-25),
2. 12203713 - Clip for tube element (2025-01-21),
3. 12123665 - Heat exchanger (2024-10-22),
4. 11828545 - Corrugated fin type heat exchanger (2023-11-28),
5. 11740027 - Stacked plate heat exchanger (2023-08-29),
6. 11506457 - Header plateless type heat exchanger (2022-11-22),
7. 11162512 - Axial-flow fan (2021-11-02),
8. 11156413 - Metal plate burring method (2021-10-26),
9. 11105559 - Drawn cup-type heat exchanger (2021-08-31),
10. 10976110 - Plate laminate type heat exchanger (2021-04-13),
11. 10935323 - Structure joined by nickel brazing (2021-03-02),
12. 10888910 - Machining method for burred flat holes in metal plates (2021-01-12),
13. 10837718 - Laminated core type heat sink (2020-11-17),
14. 10739085 - Laminated heat sink core (2020-08-11),
15. 10724807 - Heat exchanger and method for assembling same (2020-07-28),
Company Overview
T.rad Co., Ltd., based in Tokyo, specializes in advanced thermal management solutions, focusing on the development and manufacture of heat exchangers and thermal storage devices. The company is recognized for its expertise in technologies such as axial-flow fans, laminated heat sinks, and EGR coolers, which are essential in various industrial applications. With a commitment to innovation, T.rad leverages techniques like nickel brazing and aluminum alloy brazing to enhance the efficiency and performance of its products, catering to diverse market needs.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

T.rad Co., Ltd. USPTO Patent Assignee Logo
45 Patents

#848 in Tokyo

#1,829 in Japan

#15,436 in the World

Tokyo, JP
Tokyo, Japan

T.rad Co., Ltd.

Forward Citations = 146

61 inventors:

goldMedal Atsushi Okubo (13 out of 58 patents)

silverMedal Taiji Sakai (12 out of 12 patents)

bronzeMedal Takuya Bungo (10 out of 10 patents)

4.  Yoichi Nakamura (10 out of 21 patents)

5.  Masaaki Takase (3 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: T.rad Co., Ltd.. Retrieved from https://idiyas.com/company/t-rad-company

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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