Harumasa Yamasaki

This inventor holds 16 USPTO granted patents, primarily in Organic Silicon Compounds. Top assignees: Kao Corporation, Kao Soap Company, Ltd.. Active years: 1978-1995.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Harumasa Yamasaki. Retrieved from https://idiyas.com/inventor/harumasa-yamasaki

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

Calculating rank

USPTO Granted Patents = 16

% Patents Active = 100.0

Average Co-Inventor Count = 3.5

ph-index = 8

Forward Citations = 587(Granted Patents)

Location History:

Wakayama, JA (1978)
Wakayama, JP (1982 - 1995)

Company Filing History:

Kao Soap Company, Ltd.

patents

Years Active: 1978-1995

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Areas of Expertise:

Organic Silicon Compound

Photoreceptor

Water-Absorbent Materials

Polyurethane

Ion Transport

Disposable Diaper

Highly Reactive Resin

Fibrous Carboxymethyl Cellulose

Polymer Beads

Recording Material

Twisted Yarn

Absorptive Material

16 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5446527 - Method of forming fixed images (1995-08-29),

2. 5352554 - Organic silicon compound, method of its production, and photoreceptor (1994-10-04),

3. 5290963 - Organic silicon compound, method of its production, and photoreceptor (1994-03-01),

4. 5187310 - Organic silicon compound, method of its production, and photoreceptor (1993-02-16),

5. 5071822 - Recording material (1991-12-10),

6. 5032479 - Ion transport photoreceptor for electrophotography (1991-07-16),

7. 4727097 - Process for preparing highly reactive, water-absorptive resin (1988-02-23),

8. 4714719 - Catalyst for preparation of polyurethane and process for the preparation (1987-12-22),

9. 4666975 - Absorptive material (1987-05-19),

10. 4524577 - Twisted yarn (1985-06-25),

11. 4497930 - Process for producing highly water absorptive polymer (1985-02-05),

12. 4459396 - Process for producing water-absorbent materials having excellent water (1984-07-10),

13. 4446261 - Process for preparation of high water-absorbent polymer beads (1984-05-01),

14. 4410694 - Process for producing fibrous carboxymethyl cellulose (1983-10-18),

15. 4357938 - Disposable diaper (1982-11-09),

Title: Harumasa Yamasaki: Innovator in Photoreceptor Technology

Introduction

Harumasa Yamasaki is a notable inventor based in Wakayama, Japan. He has made significant contributions to the field of photoreceptor technology, holding a total of 16 patents. His work has had a profound impact on the development of materials used in electrophotography.

Latest Patents

Among his latest patents is a method of forming fixed images, which involves an organic silicon compound and its production. This innovation includes a photoreceptor that incorporates a charge transport material, demonstrating excellent sensitivity and durability. The compound is represented by a complex formula that outlines the various groups and elements involved in its structure.

Career Highlights

Yamasaki has had a distinguished career, working with prominent companies such as Kao Corporation and Kao Soap Company, Ltd. His expertise in the field has allowed him to develop groundbreaking technologies that enhance the performance of photoreceptors.

Collaborations

Throughout his career, Yamasaki has collaborated with esteemed colleagues, including Yuzo Sumida and Masayuki Mishima. These partnerships have contributed to the advancement of his research and innovations.

Conclusion

Harumasa Yamasaki's contributions to photoreceptor technology and his impressive portfolio of patents highlight his role as a leading inventor in his field. His work continues to influence advancements in electrophotography and related technologies.

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]