Kumi Hasegawa

This inventor holds 21 USPTO granted patents, plus 1 CIPO patent and 8 EPO patents, primarily in Electrophotographic Toner. Top assignee: Ricoh Company, Ltd.. Active years: 1998-2014.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kumi Hasegawa. Retrieved from https://idiyas.com/inventor/kumi-hasegawa

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

USPTO Granted Patents = 21

% Patents Active = 71.4

CIPO Patents = 1

EPO Patents = 8 (Patent Applications = 1)

Average Co-Inventor Count = 3.5

ph-index = 12

Forward Citations = 341(Granted Patents)

Location History:

Shizuoka-ken, JP (2001 - 2002)
Tokyo, JP (2002)
Ohta-ku, JP (2003)
Shizuoka, JP (2001 - 2007)
Numazu, JP (1998 - 2014)

Company Filing History:

21 out of 28,951

Ricoh Company, Ltd.

patents

Years Active: 1998-2014

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Areas of Expertise:

Electrophotographic Toner

Image Forming Method

Two-Component Developer

Toner Cartridge

Dry Toner

Image Fixing Process

Electrostatic Image Development

Toner Kit

Process Cartridge

Electrographic Image Formation

Binder Resin

Image Formation Apparatus

21 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 8785099 - Toner, developer including the toner, and developing device and image forming apparatus using the toner (2014-07-22),

2. 8202676 - Toner for developing electrostatic latent image, and image forming method using the toner (2012-06-19),

3. 8084179 - Electrostatic image developing toner having specific variation coefficient of number distribution, two-component developer, image forming method and process cartridge (2011-12-27),

4. 8034523 - Full color toner, and its use in electrophotography methods and apparatus (2011-10-11),

5. 7985518 - Toner, image forming apparatus using the same, and image forming method (2011-07-26),

6. 7522857 - Toner, image forming apparatus using the same and process cartridge (2009-04-21),

7. 7217485 - Toner for electrophotography, and image fixing process, image forming process, image forming apparatus and process cartridge using the same (2007-05-15),

8. 7183029 - Dry toner, toner kit, and image forming apparatus and process cartridge using the dry toner (2007-02-27),

9. 7163774 - Toner for forming image, method for developing electrostatic latent image, method for fixing toner image, image forming method and process cartridge using the toner (2007-01-16),

10. 7150954 - Image forming method and toner for use in the method (2006-12-19),

11. 7029816 - Electrographic image formation method (2006-04-18),

12. 6964835 - Toner and image forming method using the toner (2005-11-15),

13. 6924073 - Toner for developing electrostatic latent image, toner cartridge, developer, developer cartridge, image forming method, and image forming apparatus (2005-08-02),

14. 6899986 - Image forming method and toner for use in the method (2005-05-31),

15. 6544704 - Two-component developer, container filled with the two-component developer, and image formation apparatus (2003-04-08),

Title: Innovator Spotlight: Kumi Hasegawa - Pioneering Inventor in Imaging Technology

Introduction:

Meet Kumi Hasegawa, a talented inventor hailing from Numazu, Japan, who has made significant contributions to the field of imaging technology. With an impressive portfolio of 21 patents under his belt, his innovative spirit and dedication to pushing the boundaries of toner development have earned him acclaim in the industry.

Latest Patents:

Hasegawa's recent patents showcase his expertise in toner technology. His developments include a cutting-edge toner formulation containing a binder resin with unique properties, such as an inorganic tin (II) compound, and an external additive that enhances the toner's performance. Moreover, his work extends to the creation of a developer incorporating this toner, as well as the design of developing devices and image-forming apparatuses to produce high-quality prints.

Career Highlights:

Currently a valuable member of Ricoh Company, Ltd., Kumi Hasegawa's contributions have been instrumental in driving innovation within the organization. His exemplary work ethic and inventive prowess have played a pivotal role in advancing the company's imaging technology division, solidifying his reputation as a key player in the industry.

Collaborations:

Throughout his career, Hasegawa has collaborated closely with esteemed colleagues such as Mitsuo Aoki and Minoru Masuda. Together, they have leveraged their collective expertise to tackle complex challenges and bring novel ideas to fruition, further cementing Hasegawa's status as a collaborative and forward-thinking inventor.

Conclusion:

In conclusion, Kumi Hasegawa stands out as a trailblazer in the field of imaging technology, with a proven track record of innovation and ingenuity. His remarkable patents and successful collaborations underscore his commitment to pushing the boundaries of toner development and shaping the future of imaging technology. Kumi Hasegawa's work continues to inspire and pave the way for future advancements in the industry.

Profile summary based on public USPTO records.