Utsunomiya, Japan

Sahoko Yamashina

This inventor holds 2 USPTO granted patents. Top assignee: Kao Corporation. Active years: 1991-1993.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Sahoko Yamashina. Retrieved from https://idiyas.com/inventor/sahoko-yamashina

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile


% Patents Active = 100.0

Average Co-Inventor Count = 3.0

ph-index = 2

Forward Citations = 27(Granted Patents)


Location History:

  • Utsunomiya, JP (1991)
  • Tochigi, JP (1993)

Company Filing History:


Years Active: 1991-1993

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2 patents (USPTO):Explore Patents

Title: Sahoko Yamashina: Innovator in Shampoo Composition

Introduction

Sahoko Yamashina is a prominent inventor based in Utsunomiya, Japan. She has made significant contributions to the field of cosmetic formulations, particularly in shampoo compositions. With a total of 2 patents to her name, her work focuses on enhancing the user experience of hair care products.

Latest Patents

Yamashina's latest patents include innovative shampoo compositions that utilize unique ingredients. The first patent discloses a shampoo composition comprising an amidoamine-type amphoteric surface active agent, a specific type of modified silicone polymeric compound, and a specific type of polymer. This formulation provides an excellent soft and smooth feeling during washing and rinsing. It also offers a superb natural hair-set effect without oily stickiness and roughness, allowing for easy comb passage through the hair. Additionally, it is mild to the skin and the mucous membranes of the eyes. The second patent presents a similar shampoo composition, featuring an anidoamine-type amphoteric surface active agent, a modified silicone polymeric compound, and a specific type of polymer, ensuring the same beneficial effects.

Career Highlights

Yamashina is currently employed at Kao Corporation, a leading company in the consumer goods sector. Her work at Kao Corporation has allowed her to develop and refine her innovative shampoo formulations, contributing to the company's reputation for quality and effectiveness in personal care products.

Collaborations

Yamashina collaborates with talented colleagues, including Seiichi Kumagai and Kazuyuki Yahagi. These partnerships enhance the creative process and lead to the development of cutting-edge products in the hair care industry.

Conclusion

Sahoko Yamashina is a trailblazer in the field of shampoo compositions, with her innovative formulations setting new standards in hair care. Her contributions to Kao Corporation and the cosmetic industry are noteworthy, and her patents reflect her commitment to improving consumer experiences.

Profile summary based on public USPTO records.
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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