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For the Inventor, By the Inventor

Kanagawa, Japan

Kazufumi Tomita

This inventor holds 15 USPTO granted patents, primarily in Electrophotographic Toner. Top assignee: Fuji Xerox Co., Ltd.. Active years: 1993-2015.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kazufumi Tomita. Retrieved from https://idiyas.com/inventor/kazufumi-tomita

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

Calculating rank
USPTO Granted Patents = 15

% Patents Active = 86.7

Average Co-Inventor Count = 4.0

ph-index = 5

Forward Citations = 74(Granted Patents)


Location History:

  • Ashigara, JP (1994)
  • Minami Ashigara, JP (1995 - 2009)
  • Kanagawa, JP (1993 - 2015)

Company Filing History:

goldMedal15 out of 11,665 
 
Fuji Xerox Co., Ltd.
 patents

Years Active: 1993-2015

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Areas of Expertise:
Electrophotography
Toner Cartridge
Image Forming Apparatus
Production Method
Electrostatic Charge
Microcapsule Toner
Resin Particle Dispersion
Two-Component Developer
Electrostatic Developer
Latent Image Developer
Toner Manufacturing
Electrostatic Image
15 patents (USPTO):Explore Patents
1. 8956796 - Electrostatic charge image developing toner, electrostatic charge image developer, toner cartridge, developing device, image forming apparatus, and image forming method (2015-02-17),
2. 7588874 - Toner for developing electrostatic image used in electrophotography and process for producing the same (2009-09-15),
3. 7575841 - Toner for electrophotography, manufacturing method of toner for electrophotography, developer for electrophotography, and image forming method (2009-08-18),
4. 7498113 - Toner for developing electrostatic image, production method thereof, resin particle dispersion, and electrostatic image developer (2009-03-03),
5. 7432030 - Toner for developing electrostatic latent image, developer for developing electrostatic latent image, and process for producing toner for developing electrostatic latent image (2008-10-07),
6. 7410741 - Toner for electrophotography and developer for electrophotography, as well as image forming method (2008-08-12),
7. 7300735 - Electrophotographic toner and production method therefor (2007-11-27),
8. 7267920 - Toner for developing electrostatic latent images, production method thereof, and electrostatic latent image developer using the same (2007-09-11),
9. 6403274 - Electrophotographic toner, process for preparing the same, and two-component developer (2002-06-11),
10. 6037090 - Toner for electrophotography and method of preparation thereof (2000-03-14),
11. 6033819 - Microcapsule toner having a microphase separation structure (2000-03-07),
12. 5389490 - Capsule toner and process for producing the same (1995-02-14),
13. 5312710 - Electrophotographic toner and process for producing the same (1994-05-17),
14. 5300388 - Toner for electrophotography and process for producing the same (1994-04-05),
15. 5215851 - Electrophotographic toner (1993-06-01),

Title: Kazufumi Tomita: Innovator in Electrostatic Imaging Technology

Introduction

Kazufumi Tomita is a prominent inventor based in Kanagawa, Japan. He has made significant contributions to the field of electrostatic imaging technology, holding a total of 15 patents. His work primarily focuses on developing advanced toner and imaging devices that enhance the quality and efficiency of electrophotography.

Latest Patents

Tomita's latest patents include innovations such as an electrostatic charge image developing toner, an electrostatic charge image developer, a toner cartridge, a developing device, an image forming apparatus, and an image forming method. One of his notable inventions is an electrostatic charge image developing toner that comprises toner base particles containing a polyester resin and a vinyl resin without a coating layer. This toner features a higher concentration of polyester resin on the particle surface compared to the interior, along with sol-gel silica that has an average circularity ranging from 0.75 to 0.9.

Another significant patent involves a toner for developing electrostatic images, which includes a binder resin, a colorant, and a releasing agent. The releasing agent exhibits specific thermal properties, including an endothermic peak temperature measured by a differential scanning calorimeter between 60 to 100°C. The relationship between the endothermic amounts and the volume average particle diameter of the toner is also defined in this patent.

Career Highlights

Kazufumi Tomita is associated with Fuji Xerox Co., Ltd., where he has played a crucial role in advancing imaging technologies. His expertise in developing innovative toner solutions has positioned him as a key figure in the industry.

Collaborations

Tomita has collaborated with notable colleagues, including Shuji Sato and Hiroshi Nakazawa, contributing to various projects that enhance the capabilities of imaging technologies.

Conclusion

Kazufumi Tomita's contributions to electrostatic imaging technology through his numerous patents reflect his dedication to innovation in this field. His work continues to influence advancements in electrophotography, making a lasting impact on the industry.

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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