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Tokai Optical Co., Ltd.

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USPTO Granted Patents = 36

% Expired Patents = 8.3

EPO Patents = 32

Trademarks = 4

Forward Citations = 86

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47 inventors (with patents filed for the assignee):

Hirotoshi Takahashi (14 out of 15 patents)

Yuichi Shishino (6 out of 7 patents)

Koji Kawai (6 out of 18 patents)

4. Kotaro Kaneko (6 out of 14 patents)

5. Nobuhiro Kaneko (6 out of 11 patents)

6. Kuniyoshi Okamoto (5 out of 6 patents)

7. Tsuyoshi Fukagawa (5 out of 5 patents)

8. Masaya Suzuki (4 out of 4 patents)

9. Shingo Ono (3 out of 3 patents)

10. Hiroshi Ueno (3 out of 3 patents)

11. Koji Inui (3 out of 6 patents)

12. Yasuyuki Takeshima (3 out of 6 patents)

13. Yuji Kato (3 out of 7 patents)

14. Atsushi Nagao (2 out of 2 patents)

15. Hiroaki Watanabe (2 out of 2 patents)

Core Competencies:

Optical Product

Spectacle Lens

Plastic Lens

UV Absorbent Additive

Lens Manufacturing

Eye Movement Analysis

Progressive Power Lens

Antifog Optical Article

Displacement Prevention Coating

Optical Member

Glasses-Lens Assessment

Bending Prediction

36 patents: Sort by Forward Citations

1. 12769034 - Plastic lens for spectacles (2026-10-20),

2. 12613360 - Optical product and light concentrator (2026-04-28),

3. 12216274 - Method and program for predicting bending in optical products (2025-02-04),

4. 12180190 - Additive for imparting ultraviolet absorbency and/or high refractive index to matrix, and resin member using same (2024-12-31),

5. 11966102 - Spectacle lens and spectacles (2024-04-23),

6. 11945802 - Additive for imparting ultraviolet absorbency and/or high refractive index to matrix, and resin member using same (2024-04-02),

7. 11709292 - Optical plastic product, and plastic spectacle lens and spectacles (2023-07-25),

8. 11668957 - Optical product, plastic spectacle lens, and spectacles (2023-06-06),

9. 11422287 - Plastic spectacle lens and spectacles (2022-08-23),

10. 11401400 - Plastic lens (2022-08-02),

11. 11370780 - Additive for imparting ultraviolet absorbency and/or high refractive index to matrix, and resin member using same (2022-06-28),

12. 11186568 - Additive for imparting ultraviolet absorbency and/or high refractive index to matrix, and resin member using same (2021-11-30),

13. 11072138 - Spectacle lens manufacturing system (2021-07-27),

14. 10874357 - Eye movement measuring device and eye movement analysis system (2020-12-29),

15. 10820823 - Evaluation of inhibitory circuit and use thereof (2020-11-03),

Company Overview

Tokai Optical Co., Ltd. is a prominent player in the optical industry, specializing in the development and manufacturing of high-quality optical products. The company focuses on a diverse range of offerings, including precision lenses, optical instruments, and various optical components. With a strong emphasis on innovation and technology, Tokai Optical is dedicated to advancing optical solutions that cater to both consumer and industrial markets. Headquartered in Aichi, Japan, the company leverages its expertise to enhance visual experiences globally.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

36 Patents

#43 in Aichi

#2,102 in Japan

#18,756 in the World

Tokai Optical Co., Ltd.

Forward Citations = 86

47 inventors:

Hirotoshi Takahashi (14 out of 15 patents)

Yuichi Shishino (6 out of 7 patents)

Koji Kawai (6 out of 18 patents)

4. Kotaro Kaneko (6 out of 14 patents)

5. Nobuhiro Kaneko (6 out of 11 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Tokai Optical Co., Ltd.. Retrieved from https://idiyas.com/company/tokai-optical-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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