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Miyazaki, Japan

Well Stone Co.

USPTO Granted Patents = 14

CIPO Patents = 3

EPO Patents = 10

Forward Citations = 12

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8 inventors (with patents filed for the assignee):

Yoichi Ishii (13 out of 16 patents)

Takeshi Okamoto (10 out of 55 patents)

Sayaka Makino (6 out of 6 patents)

4. Takayuki Nemoto (3 out of 3 patents)

5. Kazuyuki Ishii (3 out of 11 patents)

6. Sayaka Ishii (2 out of 5 patents)

7. Hiroyuki Sumi (2 out of 14 patents)

8. Etsuo Yoshida (2 out of 2 patents)

9. Okamoto Takeshi (1 patent)

10. Ishii Kazuyuki (1 patent)

11. Ishii Yoichi (0 patent)

12. Makino Sayaka (0 patent)

13. Nemoto Takayuki (0 patent)

14 patents: Sort by Forward Citations

1. 12318410 - Method for producing therapeutic agent for skin lesions, and therapeutic agent for skin lesions (2025-06-03),

2. 11896625 - Method for producing therapeutic agent for skin lesions, and therapeutic agent for skin lesions (2024-02-13),

3. 11642380 - Production method of nasal drop composition, and nasal drop composition (2023-05-09),

4. 11266595 - Deodorant production method and deodorant (2022-03-08),

5. 11260022 - Method for producing oral composition, and oral composition (2022-03-01),

6. 11147842 - Method for producing therapeutic agent for skin lesions, and therapeutic agent for skin lesions (2021-10-19),

7. 11077152 - Method of producing nasal drop composition by mixing earthworm castings with water (2021-08-03),

8. 10576108 - Tau protein production accelerator, and therapeutic or preventive agent and therapeutic or preventive food composition for diseases caused by tau protein deficiency (2020-03-03),

9. 10398740 - Tau protein production accelerator, and therapeutic or preventive agent and therapeutic or preventive food composition for diseases caused by tau protein deficiency (2019-09-03),

10. 10155012 - Catecholamine production accelerator, and therapeutic and preventive agent and therapeutic and preventive food composition for diseases caused by catecholamine deficiency (2018-12-18),

11. 9511098 - Method for producing dry earthworm powder (2016-12-06),

12. 9060958 - Tyrosinase inhibitor produced using dried earthworm powder, and method for producing same (2015-06-23),

13. 8394417 - Method of producing a dry earthworm powder (2013-03-12),

14. 8137701 - Method of producing a dry earthworm powder (2012-03-20),

Company Overview

Well Stone Co. is a Japanese company based in Miyazaki, specializing in the development and manufacturing of advanced materials and components. The organization focuses on innovative solutions for various industries, including construction and infrastructure, emphasizing durability and performance. Well Stone Co. leverages cutting-edge technology to enhance product quality and sustainability, positioning itself as a key player in the materials sector within the region and beyond.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

14 Patents

#6 in Miyazaki

#3,584 in Japan

#42,290 in the World

Miyazaki, Japan

Well Stone Co.

Forward Citations = 12

8 inventors:

Yoichi Ishii (13 out of 16 patents)

Takeshi Okamoto (10 out of 55 patents)

Sayaka Makino (6 out of 6 patents)

4. Takayuki Nemoto (3 out of 3 patents)

5. Kazuyuki Ishii (3 out of 11 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Well Stone Co.. Retrieved from https://idiyas.com/company/well-stone-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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