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For the Inventor, By the Inventor

Osaka, Japan

Rengo Co., Ltd.

Calculating rank
USPTO Granted Patents = 77

% Expired Patents = 10.4



Forward Citations = 849

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124 inventors (with patents filed for the assignee):

goldMedal Masateru Tokuno (39 out of 54 patents)

silverMedal Tetsuya Sawada (18 out of 18 patents)

bronzeMedal Yasuharu Mori (11 out of 11 patents)

4.  Hidenao Saito (8 out of 8 patents)

5.  Kouju Sugiyama (5 out of 5 patents)

6.  Hiromu Ikeda (5 out of 5 patents)

7.  Takafumi Makiuchi (5 out of 5 patents)

8.  Yoichi Nishikawa (4 out of 6 patents)

9.  Hirokuni Tajima (4 out of 4 patents)

10.  Masao Fujita (4 out of 4 patents)

11.  Yoshihiro Ishii (4 out of 4 patents)

12.  Masayuki Handa (3 out of 3 patents)

13.  Atsuo Ishikawa (3 out of 3 patents)

14.  Hiroyuki Noguchi (3 out of 4 patents)

15.  Kiyoshi Kamei (3 out of 3 patents)


Core Competencies:
Corrugated Board
Cellulose Materials
Photoluminescent Coatings
Moldable Pulp
Antimicrobial Agents
Functional Materials
Web Printing
Adhesives
Die Cutting
Height-Adjustable Boxes
Volatile Agents
Packaging Devices

77 patents:

1. 11833774 - Dimensionally variable lid manufacturing method and dimensionally variable lid manufacturing device (2023-12-05),
2. 11149134 - Resin composition containing cellulose xanthate fine fibers (2021-10-19),
3. 10662257 - Cellulose xanthate nanofiber (2020-05-26),
4. 10619093 - Photoluminescent material (2020-04-14),
5. 10597184 - Method and device for assembling height-adjustable box (2020-03-24),
6. 10427828 - Corrugated paperboard box, perforation forming method for perforating corrugated paperboard sheet, and perforation forming device and perforation forming unit for perforating corrugated paperboard sheet (2019-10-01),
7. 10301058 - Locking structure, container utilizing locking structure, and container assembling apparatus (2019-05-28),
8. 9994355 - Packing box and box manufacturing apparatus (2018-06-12),
9. 9938039 - Box for packing and exhibiting product, and packing device therefor (2018-04-10),
10. 9821925 - Method and device for assembling height-adjustable box (2017-11-21),
11. 8491141 - Photoluminescent material containing silver ion (2013-07-23),
12. 8383526 - Sheet for total heat exchanger (2013-02-26),
13. 8277911 - Anticorrosion composition (2012-10-02),
14. 7910209 - Cellulose granules for carrying functional substances (2011-03-22),
15. 7892334 - Package of volatile substance and air conditioner for vehicles provided with the package (2011-02-22),
Company Overview
Rengo Co., Ltd., headquartered in Osaka, Japan, specializes in advanced packaging technology, focusing on innovative solutions in corrugated board and cellulose materials. The company is recognized for its development of functional materials, including photoluminescent coatings and antimicrobial agents, which enhance product safety and usability. Rengo also explores moldable pulp and web printing technologies, alongside a range of adhesives, positioning itself as a leader in sustainable packaging solutions and functional material applications.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

77 Patents

#144 in Osaka

#1,337 in Japan

#9,786 in the World

Osaka, JP
Osaka, Japan

Rengo Co., Ltd.

Forward Citations = 849

124 inventors:

goldMedal Masateru Tokuno (39 out of 54 patents)

silverMedal Tetsuya Sawada (18 out of 18 patents)

bronzeMedal Yasuharu Mori (11 out of 11 patents)

4.  Hidenao Saito (8 out of 8 patents)

5.  Kouju Sugiyama (5 out of 5 patents)

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