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Seed Company Limited

USPTO Granted Patents = 34

% Expired Patents = 47.1

EPO Patents = 35

Trademarks = 1

Forward Citations = 132

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64 inventors (with patents filed for the assignee):

Shigeru Tamai (12 out of 24 patents)

Takao Sato (9 out of 71 patents)

Yoshiko Yamazaki (7 out of 7 patents)

4. Yuji Koyama (7 out of 8 patents)

5. Toru Matsunaga (6 out of 6 patents)

6. Kenji Uno (4 out of 4 patents)

7. Masatoshi Shintani (4 out of 13 patents)

8. Kouhei Koyama (4 out of 15 patents)

9. Kazuki Morimoto (3 out of 4 patents)

10. Yasuhiro Nishioka (3 out of 3 patents)

11. Tsutomu Fukushima (3 out of 9 patents)

12. Akira Nakamura (1 out of 107 patents)

13. Masataka Nakamura (1 out of 63 patents)

14. Rumiko Kitagawa (1 out of 19 patents)

15. Kazunori Kobayashi (1 out of 64 patents)

Core Competencies:

Ophthalmic Lens

Contact Lens

Drug Release

Polymer Compound

Hydrogel

Elastomer Composition

UV Absorbing Lens

Anionic Device

Functional Polymer Gel

Mark Transfer Tool

Used Paper Recycling

Production Method

34 patents: Sort by Forward Citations

1. 12349865 - Endoscope hood (2025-07-08),

2. 12178938 - UV absorbing ocular lens (2024-12-31),

3. 12161652 - Anionic drug-containing ophthalmic device (2024-12-10),

4. 11439146 - Anti-Acanthamoeba contact lens solution (2022-09-13),

5. 11292762 - Polymer including polymerizable triptycene derivative compound as component (2022-04-05),

6. 11203567 - Polymerizable triptycene derivative compound, and polymer compound including same as constituent component (2021-12-21),

7. 11119338 - Soft contact lens and method for suppressing attachment of soft contact lens onto cornea (2021-09-14),

8. 10669226 - Polymerizable triptycene derivative compound (2020-06-02),

9. 10668157 - Anionic drug-containing medical device (2020-06-02),

10. 10642069 - Production method of unhydrated ophthalmic lens and unhydrated ophthalmic lens (2020-05-05),

11. 10159642 - Functional polymer gel containing organic nanotubes and method for producing same (2018-12-25),

12. 9921419 - Annular device (2018-03-20),

13. 9486362 - Ring-shaped device (2016-11-08),

14. 9329408 - Wettable hydrogel contact lens and method for producing same (2016-05-03),

15. 9127404 - Used paper recycling apparatus and its constituent devices (2015-09-08),

Company Overview

Seed Company Limited, based in Tokyo, specializes in the development and manufacturing of advanced agricultural technologies. The company focuses on innovative solutions that enhance crop productivity and sustainability, leveraging cutting-edge research in biotechnology and genetic engineering. With a commitment to addressing global food security challenges, Seed Company Limited collaborates with various stakeholders to promote sustainable farming practices and improve agricultural efficiency across diverse environments.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

34 Patents

#1,009 in Tokyo

#2,170 in Japan

#19,631 in the World

Seed Company Limited

Forward Citations = 132

64 inventors:

Shigeru Tamai (12 out of 24 patents)

Takao Sato (9 out of 71 patents)

Yoshiko Yamazaki (7 out of 7 patents)

4. Yuji Koyama (7 out of 8 patents)

5. Toru Matsunaga (6 out of 6 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Seed Company Limited. Retrieved from https://idiyas.com/company/seed-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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