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Kao Soap Company, Ltd.

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USPTO Granted Patents = 341

Trademarks = 1

Forward Citations = 4,457

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360 inventors (with patents filed for the assignee):

Yoshiaki Inamoto (45 out of 53 patents)

Naotake Takaishi (30 out of 51 patents)

Yunosuke Nakagawa (18 out of 18 patents)

4. Haruhiko Arai (17 out of 17 patents)

5. Shigeo Inoue (15 out of 16 patents)

6. Yoshiaki Fujikura (15 out of 50 patents)

7. Kiyoshi Tsuchihashi (15 out of 15 patents)

8. Hidemasa Ohmura (14 out of 14 patents)

9. Takashi Fujino (14 out of 14 patents)

10. Kinjiro Matsunaga (14 out of 15 patents)

11. Hiroshi Watanabe (14 out of 21 patents)

12. Hiroshi Mizutani (13 out of 18 patents)

13. Hisao Tsutsumi (13 out of 18 patents)

14. Takeo Okumura (13 out of 18 patents)

15. Moriyasu Murata (12 out of 27 patents)

Core Competencies:

Hair Treatments

Shampoo Composition

Hair Rinse Composition

Hair Setting Lotion

Liquid Detergent

Emulsifying Agent

Cosmetic Composition

Skin Care

Water Absorbing Material

Aqueous Biocide

Disposable Diaper

Ceramic Tapes

341 patents: Sort by Forward Citations

1. 5094764 - Method for supplying a lubricating oil composition (1992-03-10),

2. 4970011 - Lubricating oil useful in the rolling of metal and a method for (1990-11-13),

3. 4895722 - Hair treatments (1990-01-23),

4. 4794034 - Water absorbing article (1988-12-27),

5. 4770694 - Aqueous biocide suspension (1988-09-13),

6. 4751074 - Hair rinse composition (1988-06-14),

7. 4634719 - .alpha.-Mono (methyl-branched alkyl) glyceryl ether and a skin care (1987-01-06),

8. 4617243 - Electrochemical battery (1986-10-14),

9. 4555557 - Maleic acid/(meth)acrylic acid copolymer (1985-11-26),

10. 4536519 - Emulsifying agent and emulsified cosmetics (1985-08-20),

11. 4520008 - Hair setting lotion (1985-05-28),

12. 4519920 - Maleic acid/(meth)acrylic acid copolymers useful as calcium ion (1985-05-28),

13. 4515852 - Leather-like sheet material having low slip characteristics (1985-05-07),

14. 4504464 - 2,3-Dialkoxypropyl glyceryl ether and its preparation process as well as (1985-03-12),

15. 4496509 - Method of producing ceramic tapes (1985-01-29),

Company Overview

Kao Soap Company, Ltd., headquartered in Tokyo, Japan, specializes in the development and manufacturing of hair treatment products. The company focuses on innovative formulations in areas such as shampoo and hair rinse compositions, hair setting lotions, and emulsifying agents. With a strong emphasis on cosmetic and skin care solutions, Kao integrates advanced technology to enhance product efficacy and user experience. Their commitment to quality and sustainability positions them as a leader in the personal care industry.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

341 Patents

#248 in Tokyo

#492 in Japan

#2,666 in the World

Kao Soap Company, Ltd.

Forward Citations = 4,457

360 inventors:

Yoshiaki Inamoto (45 out of 53 patents)

Naotake Takaishi (30 out of 51 patents)

Yunosuke Nakagawa (18 out of 18 patents)

4. Haruhiko Arai (17 out of 17 patents)

5. Shigeo Inoue (15 out of 16 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Kao Soap Company, Ltd.. Retrieved from https://idiyas.com/company/kao-soap-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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